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Bypassing the Cache in a One-Way Fast-Write Network

If you are using the two-way fast-write function (that is, two adapters have access to a
fast-write disk drive), you can choose whether you want fast-write operations to
continue if the partner adapter fails or becomes not accessible. By default , fast-write
operations continue.

1. For fast-path access to the Change/Show Characteristics of an SSA Logical Disk

menu:

a. Type

smitty chgssardsk

and press Enter.

b. From the menu displayed, select the logical disk that you want to change.

Otherwise:

a. Select Change/Show Characteristics of an SSA Logical Disk from the SSA

Logical Disks menu.

b. From the menu displayed, select the logical disk that you want to change.

A list of options for the logical disk drives is displayed:

Change/Show Characteristics of an SSA Logical Disk

Type or select values in entry fields.
Press Enter AFTER making all desired changes.

[MORE...6]

[Entry Fields]

Location Label

[ ]

Parent

ssar

Size in Megabytes

4512

adapter_a

ssa0

adapter_b

ssa1

primary_adapter

adapter_a

+

Connection address

0004AC506C3600E

Physical volume IDENTIFIER

00406fdac2fb8203000000>

ASSIGN physical volume identifier

no

+

RESERVE disk on open

yes

+

Queue depth

[5]

+

Maximum Coalesce

[0x20000]

+

Enable Fast-Write

yes

+

Bypass Cache In 1 Way Fast-Write Network

no

+

[BOTTOM]

F1=HelpF2=Refresh

F3=Cancel

F4=List

F5=Reset

F6=Command

F7=Edit

F8=Image

F9=Shell

F10=Exit

Enter=Do

2. If you do not want the fast-write function to continue on a particular disk drive if the

partner adapter becomes not accessible, set the Bypass Cache in 1 Way
Fast-Write Network flag to yes for that disk drive. With the flag set to yes, an error
is logged when the cache is bypassed.

If you want the fast-write function to continue on a particular disk drive if the partner
adapter becomes not accessible, set the Bypass Cache in 1 Way Fast-Write
Network flag to no for that disk drive.

Chapter 10. Using the Fast-Write Cache Feature

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Summary of Contents for Advanced SerialRAID Adapters SA33-3285-02

Page 1: ...Advanced SerialRAID Adapters User s Guide and Maintenance Information SA33 3285 02 ...

Page 2: ......

Page 3: ...Advanced SerialRAID Adapters User s Guide and Maintenance Information SA33 3285 02 ...

Page 4: ...u This publication could contain technical inaccuracies or typographical errors Changes are periodically made to the information herein these changes will be incorporated in new editions of the publication It is possible that this publication may contain reference to or information about products machines and programs programming or services that are not announced in your country Such references o...

Page 5: ...Loops Links and Data Paths 7 Simple Loop 8 Simple Loop One Disk Drive Missing 9 Simple Loop Two Disk Drives Missing 10 One Loop with Two Adapters in One Using System 11 One Loop with Two Adapters in Each of Two Using Systems 12 Two Loops with One Adapter 14 Two Loops with Two Adapters 15 Large Configurations 16 Switching Off Using Systems 17 Switching On Using Systems 17 Configuring Devices on an ...

Page 6: ...ccess to the SSA RAID Arrays SMIT Menu 43 Chapter 5 Hot Spare Management 45 Deciding how to Configure Hot Spare Disk Drive Pools 45 Choosing How Many Hot Spare Disk Drives to Include in Each Pool 51 Choosing the Error Threshold Alarm Level for a Hot Spare Pool 51 Rules for Hot Spare Disk Drive Pools 52 Solving Hot Spare Pool Problems 53 Chapter 6 Using the RAID Array Configurator 57 Installing and...

Page 7: ...ying Data from an Array 151 Using the ssaraid Command to Create a RAID Copy Array from a RAID 1 or RAID 10 Array 151 Using SMIT to Create a RAID Copy Array from a RAID 1 or RAID 10 Array 155 Using the ssa_make_copy Command to Create a RAID Copy from a RAID 1 or RAID 10 Array 159 ssa_make_copy Command 161 Purpose 161 Syntax 161 Description 161 Flags 162 Example 1 Copying a Complete Volume Group 164...

Page 8: ...ive 214 Enabling or Disabling Fast Write for Multiple Devices 215 Bypassing the Cache in a One Way Fast Write Network 217 Dealing with Fast Write Problems 218 SRN 42521 218 SRN 42524 220 SRN 42525 220 Chapter 11 SSA Error Logs 221 Error Logging 221 Summary 221 Detailed Description 222 Error Logging Management 228 Summary 228 Detailed Description 228 Error Log Analysis 229 Summary 229 Detailed Desc...

Page 9: ...rivers 255 Interface between the SSA Adapter Device Driver and Head Device Driver 256 Trace Formatting 256 SSA Adapter Device Driver 257 Purpose 257 Syntax 257 Description 257 PCI SSA Adapter ODM Attributes 257 Device Dependent Subroutines 258 Summary of SSA Error Conditions 259 Managing Dumps 259 Files 260 IOCINFO Device Information SSA Adapter Device Driver ioctl Operation 261 Purpose 261 Descri...

Page 10: ...3 Description 283 Return Values 284 Files 284 SSADISK_LIST_PDISKS SSA Disk Device Driver ioctl Operation 285 Purpose 285 Description 285 Return Values 286 Files 286 SSA Disk Concurrent Mode of Operation Interface 287 Device Driver Entry Point 287 Top Kernel Extension Entry Point 288 SSA Disk Fencing 290 SSA Target Mode 291 Configuring the SSA Target Mode 292 Buffer Management 293 Understanding Tar...

Page 11: ...al and Replacement Procedures 319 Exchanging Disk Drives 319 Changing Pdisk and Hdisk Numbers 326 Removing and Replacing an Advanced SerialRAID Adapter 327 Removing an SDRAM Module of an Advanced SerialRAID Adapter 329 Installing an SDRAM Module of an Advanced SerialRAID Adapter 330 Removing the Fast Write Cache Option Card of an Advanced SerialRAID Adapter 332 Installing the Fast Write Cache Opti...

Page 12: ...n 348 Flags 348 Output 348 ssadisk Command 349 Purpose 349 Syntax 349 Description 349 Flags 349 ssadload Command 350 Purpose 350 Syntax 350 Description 350 Flags 351 Examples 351 ssa_ela Command 353 Purpose 353 Syntax 353 Description 353 Flags 353 Output 354 ssaencl Command 355 Purpose 355 Syntax 355 Description 355 Flags 355 Examples 357 ssa_format Command 358 Purpose 358 Syntax 358 Description 3...

Page 13: ...rogress Command 365 Purpose 365 Syntax 365 Description 365 Flags 365 Output 365 Examples 365 ssa_rescheck Command 366 Purpose 366 Syntax 366 Description 366 Flags 366 Output 366 Examples 367 Return Codes 367 ssa_servicemode Command 368 Purpose 368 Syntax 368 Description 368 Flags 368 Output 368 ssa_speed Command 369 Purpose 369 Syntax 369 Description 369 Flags 369 Output 370 Examples 370 ssavfynn ...

Page 14: ...isk Drive Removed 406 Finding the Physical Location of a Device 409 Finding the Device When Service Aids Are Available 409 Finding the Device When No Service Aids Are Available 409 Chapter 18 SSA Problem Determination Procedures 411 Service Request Numbers SRNs 411 The SRN Table 411 Using the SRN Table 411 Software and Microcode Errors 441 SSA Loop Configurations that Are Not Valid 441 SSA Mainten...

Page 15: ... Zealand Compliance Statement 485 International Electrotechnical Commission IEC Statement 486 Avis de conformité à la réglementation d Industrie Canada 486 Industry Canada Compliance Statement 486 United Kingdom Telecommunications Requirements 486 European Union EU Statement 486 Radio Protection for Germany 486 Taiwan Class A Compliance Statement 487 Glossary 489 Index 493 Contents xiii ...

Page 16: ...xiv User s Guide and Maintenance Information ...

Page 17: ...on checklist specified in the Installation and Service Guide for your using system For safety checks when servicing refer to that manual and to the Installation and Service Guide for your subsystem CAUTION A lithium battery can cause fire explosion or a severe burn Do not recharge disassemble heat above 100 C 212 F solder directly to the cell incinerate or expose cell contents to water Keep away f...

Page 18: ...xvi User s Guide and Maintenance Information ...

Page 19: ...e Fast Write feature v SSA error logs v How to use the SSA Command Line Interface v How to use the programming interface Part 2 of this book is mainly for service representatives It describes v General technical topics about the Advanced SerialRAID Adapters v Removal and replacement procedures v How to use the SSA Command Line Utilities v The SSA service aids v Problem determination procedures inc...

Page 20: ...eb page shown here This web page provides access to the latest SSA publications micorocde and support information for the using system SSA adapters and SSA subsystem http www storage ibm com hardsoft products ssa Numbering Convention In this book KB means 1 000 bytes MB means 1 000 000 bytes GB means 1 000 000 000 bytes xviii User s Guide and Maintenance Information ...

Page 21: ...Part 1 User Information 1 ...

Page 22: ...2 User s Guide and Maintenance Information ...

Page 23: ...ced SerialRAID Plus Adapter unless otherwise stated Serial Storage Architecture SSA Serial Storage Architecture SSA is an industry standard interface that provides high performance fault tolerant attachment of I O storage devices In SSA subsystems transmissions to several destinations are multiplexed the effective bandwidth is further increased by spatial reuse of the individual links Commands are...

Page 24: ...chitecture and devices that use SSA These adapters provide support for two SSA loops Each loop can contain a maximum of eight pairs of adapter connectors and a maximum of 48 disk drives See also Rules for SSA Loops on page 22 1 Connector B2 5 Green light 2 Green light 6 Connector A1 3 Connector B1 7 Type number label 4 Connector A2 4 P 1 2 3 4 5 6 7 Figure 1 An Advanced SerialRAID Adapter Card Typ...

Page 25: ...veral member disk drives Each array is handled as one disk by the operating system The array management software translates requests to this disk into requests to the member disk drives Although this adapter is a RAID adapter it can be configured so that all some or none of the disk drives that are attached to it are member disk drives of arrays The Advanced SerialRAID Adapter can be connected by ...

Page 26: ...nk is active Port Addresses of the Advanced SerialRAID Adapters The port addresses used in some SRNs that relate to these adapters can be numbers 0 through 3 They correspond to the port connectors on the SSA adapter 0 Connector A1 1 Connector A2 2 Connector B1 3 Connector B2 SSA Adapter ID during Bring Up All adapters that can be used on RISC using systems generate a three digit configuration prog...

Page 27: ...connector of the SSA adapter and passes through a link SSA cable to the devices The loop continues through the devices then returns through another link to a second connector on the SSA adapter The maximum permitted length for an external copper cable that connects two SSA nodes for example disk drives is 25 meters 82 feet The maximum permitted length for an external fiber optic cable that connect...

Page 28: ...vice Data can travel in either direction round the loop The adapter can therefore get access to the devices 3 disk drives in this example through two data paths The adapter always however uses the path that has the fewest interconnecting devices between the adapter and the destination device The using system cannot detect which data path is being used Using system Disk 1 Disk 2 Disk 3 Disk 4 Disk ...

Page 29: ...system The adapter now uses the alternative path to some of the devices In Figure 3 disk drive number 3 has failed Disk drives 1 and 2 can communicate with the using system only through connector A1 of the SSA adapter Disk drives 4 through 8 can communicate only through connector A2 of the SSA adapter Using system Disk 1 Disk 2 Disk 3 Disk 4 Disk 5 Disk 6 Disk 7 Disk 8 A1 A2 B1 B2 Figure 3 Simple ...

Page 30: ...drives 1 and 2 can communicate with the using system only through connector A1 of the SSA adapter Disk drive number 8 can communicate with the using system only through connector A2 of the SSA adapter Disk drives 4 5 and 6 are isolated from the SSA adapter Using system Disk 1 Disk 2 Disk 3 Disk 4 Disk 5 Disk 6 Disk 7 Disk 8 A1 A2 B1 B2 Figure 4 Simple Loop with Two Disk Drives Missing 10 User s Gu...

Page 31: ...onfiguration all the disk drives can still communicate with the using system if one SSA adapter fails Using System A1 A2 B1 B2 A1 A2 B1 B2 Disk 1 Disk 2 Disk 3 Disk 4 Disk 5 Disk 6 Disk 7 Disk 8 Disk 12 Disk 11 Disk 10 Disk 9 Disk 16 Disk 15 Disk 14 Disk 13 1 2 Figure 5 One Loop with Two Adapters in One Using System Chapter 2 Introducing SSA Loops 11 ...

Page 32: ... but remain powered on the bypass card does not operate and the disk drives become isolated For more information about bypass cards see the publications for your disk subsystem or enclosure In Figure 6 SSA adapters 1 and 2 are in using system 1 SSA adapters 3 and 4 are in using system 2 In each using system the two adapters are connected to each other If the two SSA adapters of either using system...

Page 33: ...ed on disk drives 1 through 12 can still communicate with using system 2 Disk drives 13 through 16 however cannot communicate with using system 2 because their data paths are through the adapters in using system 1 When using system 1 is rebooted disk drives 13 through 16 remain unavailable for a long time Using System 1 A1 A2 B1 B2 A1 A2 B1 B2 Disk 1 Disk 2 Disk 3 Disk 4 Disk 5 Disk 6 Disk 7 Disk ...

Page 34: ... SSA loops the adapter can provide support for up to 96 disk drives a maximum of 48 per loop Figure 8 shows an example configuration that has two loops and one adapter Adapter SSA Disk Drives Figure 8 Two Loops with One Adapter 14 User s Guide and Maintenance Information ...

Page 35: ... provide support for up to 96 SSA disk drives a maximum of 48 per loop Figure 9 shows an example configuration that has two loops and two adapters Adapter Adapter SSA Disk Drives Figure 9 Two Loops with Two Adapters Chapter 2 Introducing SSA Loops 15 ...

Page 36: ...ers in four using systems Adapter Adapter Adapter Adapter Adapter Adapter Adapter Adapter SSA Disk Drives Figure 10 A Large Configuration of Thirty Two Disk Drives Connected to Eight SSA Adapters in Eight Using Systems SSA Disk Drives Adapter Adapter Adapter Adapter Adapter Adapter Adapter Adapter Using System A Using System C Using System B Using System D Figure 11 A Large Configuration of Thirty...

Page 37: ...ore information about bypass cards see the publications for your disk subsystems or enclosures Switching On Using Systems When you switch on using systems of a large configuration ensure that each using system configures all the disk drives in the SSA loop You can switch on each using system and give the cfgmgr command to ensure that all the disk drives are configured If however you need your pdis...

Page 38: ... remaining using systems 2 On each using system a Run the cfgmgr command to configure all the disk drives b Manually vary on the volume groups and mount the file systems as required SSA Link Speed Some SSA devices can run at 20 MB per second others can run at 40 MB per second Both types of devices can exist in a particular configuration but for best performance all links should run at the same spe...

Page 39: ...adapter in the using system and the type of device that is attached The location of the device within the SSA loop must be found by use of a service aid The service aids use the IEEE standard 16 digit unique ID of the device Pdisks Hdisks and Disk Drive Identification The physical disk drives pdisks in an SSA subsystem can be configured as logical units LUNs A LUN is also known as an hdisk and can...

Page 40: ...s related to physical disk drives For this reason errors that occur on SSA disk drives are always logged against the physical disk drive pdisk If a disk drive that has been formatted on a machine of a particular type for example a personal computer is later installed into a using system that is of a different type for example a large host system that disk drive is configured only as a pdisk during...

Page 41: ...part of the UID the Connection Address consists of the LUN name and the device type identifier The software uses this information to access the device Full UID 0000XXXXXXNNNNNN Disk drive serial number XXNNNNNN Connection Address XXXXXXNNNNNNLLD where XXXXXX IEEE Organization Identifier manufacturer NNNNNN Product ID assigned unique number LL LUN always 00 for a LUN device D Device type D for an S...

Page 42: ... RAID or fast write operations and by the type of adapter see Table 1 Table 1 Number of Adapters that are Supported in an SSA Loop Array Type Number of Adapters in Loop Type of Adapters Allowed Non RAID 8 Advanced SerialRAID Adapter PCI SSA Multi Initiator RAID EL Adapter Micro Channel SSA Multi Initiator RAID EL Adapter RAID 0 1 Advanced SerialRAID Adapter RAID 1 2 Advanced SerialRAID Adapter at ...

Page 43: ... of the adapter microcode 1 Type on the command line lscfg vl ssan where ssan is the name of the adapter whose microcode you are checking for example ssa0 A list of vital product data VPD is displayed 2 Find ROS Level and ID for example 5000 Chapter 2 Introducing SSA Loops 23 ...

Page 44: ...ne which data is accessed most frequently 2 Assign that data to those disks drives that are farthest round the loop from the adapter connectors By doing this action you prevent the activity of the busiest disk drive from obstructing the data path to the other disk drives For example the loop that is shown in Figure 12 contains 16 disk drives and the adapter connectors are between disk drives 1 and...

Page 45: ...arthest from the adapter connectors By doing this action you prevent the activity of the busiest disk drive from obstructing the data path to the other disk drives For example the loop that is shown in Figure 13 contains 16 disk drives The connectors of adapter A are between disk drives 1 and 16 and the connectors of adapter B are between disks 8 and 9 Therefore v Adapter A should access disk driv...

Page 46: ...y adapters B and C should be put onto disk drives 5 through 8 Note For configurations such as that shown here we recommend that the adapters be installed in separate using systems Otherwise disk drives can become isolated should both adapters fail or be held reset in one of the using systems See One Loop with Two Adapters in One Using System on page 11 and One Loop with Two Adapters in Each of Two...

Page 47: ...g the chdev command The ssavfynn command described in ssavfynn Command on page 371 can be used to verify that no duplicate node numbers exist v If a reservation is challenged that is a node that does not hold the reservation attempts to access a reserved SSA logical disk the adapter verifies that a valid path still exists to the node that is holding the reservation If no path exists the reservatio...

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Page 49: ...rroring across two member disk drives to protect against loss of data v RAID 5 provides data striping with parity data across disk drives to provide protection against loss of data v RAID 10 provides data striping and data mirroring across disk drives to provide protection against loss of data Availability Availability is an important consideration that can affect the way you configure your arrays...

Page 50: ...complete domain fails through loss of power Disk Drives That Are Not in Arrays Disk drives that are connected to an SSA RAID adapter do not need to be members of an array The SSA RAID adapter handles such disk drives in the same way as a non RAID SSA adapter does It transfers data directly between the disk drives and the system and uses no RAID functions When first installed all disk drives are by...

Page 51: ...ur arrays The states are described here Good State A RAID 0 array is in the Good state when all the member disk drives of that array are present Offline State A RAID 0 array enters Offline state when one or more member disk drives become missing Read and write operations are not allowed Chapter 3 RAID Functions and Array States 31 ...

Page 52: ...ns prevent operation on separate member disk drives of the array when the array becomes split but separate systems can still access one of the member disk drives RAID 10 defines the first and third disk drives to be primary member disk drives RAID 1 defines the first disk drive to be the equivalent of the first and third disk drives together If the first disk drive is missing in RAID 1 it is equiv...

Page 53: ...ray management software immediately exchanges a hot spare disk drive for the missing disk drive if a hot spare disk drive is enabled and available when the read command is sent Write Operations while in the Exposed State When a write command is sent to an array that is in the Exposed state the array management software does the following v If a hot spare disk drive is enabled and available when th...

Page 54: ...s during the initial rebuilding operation no hot spare disk drive is exchanged for the failing disk drive Disk Drive Replacement An array enters Rebuilding state after a missing disk drive has been returned to the array or exchanged for a replacement disk drive When the array is in this state all the member disk drives are present but the data and parity are being rebuilt on the returned or replac...

Page 55: ...rray enabledfor HotSpare HotSpare swappedin HotSpare available Array Rebuilding Allow Writewhile Exposed WriteOp rejected ArrayDegraded noprotection N N N Y Y Y N N Disk fails Diskrejected ArrayDegraded ArrayGood Disk isremoved ArrayExposed Figure 15 RAID 5 Array State Flowchart Chapter 3 RAID Functions and Array States 35 ...

Page 56: ...normally access the array v If the using system fails at the site that contains the secondary member disk drive the using system that has access to the primary configuration disk drives continues to operate v If the using system that has access to the primary configuration disk drives fails and the primary configuration disk drives also fail only the site that contains the secondary configuration ...

Page 57: ...ray returns to the Good State If the medium error table fills during a rebuilding operation the array remains in the Rebuilding state until space becomes available in the table Offline State A RAID 10 array can be in the Offline state for any of the following reasons v No NVRAM is available to operate the array v The array is split across SSA loops v All these three conditions exist In the seconda...

Page 58: ... available and v Neither of the member disk drives that hold configuration sectors in the primary half of the array is available Multiple States Different member disk drives of a RAID 10 array can be in different states For example one mirrored pair might be rebuilding while in a different pair one member disk drive is missing and the remaining member is in the Degraded state A priority of array s...

Page 59: ...follow remain the same whichever of the two commands you use If you send the smit command from a graphics terminal however the menus are displayed slightly differently from those shown in this book If you are not familiar with the selection of items from the graphics versions of the menus use the smitty command The menus will then appear as shown in this book 2 Different microcode levels might cau...

Page 60: ...he SSA Adapters menu is displayed SSA Adapters Move cursor to desired item and press Enter List All SSA Adapters Change Show Characteristics of an SSA Adapter Generate Error Report Trace an SSA Adapter Change Show the SSA Node Number for this System List All SSA Adapter Dumps Copy an SSA Adapter Dump F1 Help F2 Refresh F3 Cancel F8 Image F9 Shell F10 Exit Enter Do If you need help with an item mov...

Page 61: ...er SSA Logical Disks SSA Physical Disks F1 Help F2 Refresh F3 Cancel F8 Image F9 Shell F10 Exit Enter Do Select the type of SSA disk on which you want to work v SSA logical disks are configured into the using system as hdisks SSA hdisks can be single disk drives or SSA RAID arrays v SSA physical disks are configured into the using system as pdisks SSA pdisks are used for service and configuration ...

Page 62: ...you need help with an item move the cursor to that item and press F1 Help 5 The SSA Physical Disks menu is displayed SSA Physical Disks Move cursor to desired item and press Enter List All Defined SSA Physical Disks List All Supported SSA Physical Disks Add an SSA Physical Disk Change Show Characteristics of an SSA Physical Disk Remove an SSA Physical Disk Configure a Defined SSA Physical Disk Gen...

Page 63: ... All Defined SSA RAID Arrays List Identify SSA Physical Disks List Delete Old RAID Arrays Recorded in an SSA RAID Manager List Status of Hot Spare Pools List Status of Hot Spare Protection for an SSA RAID Array List Components in a Hot Spare Pool Add a Hot Spare Pool Add an SSA RAID Array Delete an SSA RAID Array Change Show Attributes of an SSA RAID Array Change Member Disks in an SSA RAID Array ...

Page 64: ...44 User s Guide and Maintenance Information ...

Page 65: ...to Configure Hot Spare Disk Drive Pools RAID 1 and RAID 10 arrays provide data protection by writing the same data to two disk drives at the same time You can provide more data protection if you put the two disk drives into separate physical domains These physical domains can be separate SSA disk enclosures separate power sources or separate rooms or buildings When you use separate physical domain...

Page 66: ...k1 and pdisk4 have been assigned as hot spare disk drives but no hot spare pool has been defined Primary Disks Building 1 Building 2 pdisk1 Spare pdisk3 pdisk2 pdisk10 pdisk11 A D A P T E R A D A P T E R pdisk12 pdisk4 Spare pdisk6 pdisk5 pdisk7 pdisk8 pdisk9 Secondary Disks Figure 16 Primary Disks in Building 1 Secondary Disks in Building 2 46 User s Guide and Maintenance Information ...

Page 67: ... the Offline state because one of its four primary disk drives is in building 2 Only the three primary disk drives that are in building 1 are operational Primary Disks Building 1 Building 2 pdisk1 Spare pdisk3 pdisk2 Failed pdisk10 pdisk11 A D A P T E R A D A P T E R pdisk12 pdisk4 pdisk6 pdisk5 pdisk7 pdisk8 pdisk9 Secondary Disks Figure 17 Primary Disk in Building 1 Secondary Disks in Building 2...

Page 68: ...sk drive in Pool A1 now causes pdisk1 to be selected as the hot spare disk drive Hot spare pools can be configured in other ways as shown in figures 19 through 21 Primary Disks Building 1 Building 2 Pool A1 Pool A2 pdisk1 Spare pdisk3 pdisk2 pdisk10 pdisk11 A D A P T E R A D A P T E R pdisk12 pdisk4 Spare pdisk6 pdisk5 pdisk7 pdisk8 pdisk9 Secondary Disks Figure 18 Primary Disk in Building 1 Secon...

Page 69: ...different enclosure Pools A1 and A2 each contain an hdisk and a hot spare disk drive The pools ensure that if any one SSA enclosure fails completely three disk drives are always available for each hdisk Pool A2 hdisk hdisk Pool A1 Enclosure 1 Enclosure 2 Enclosure 3 Enclosure 4 pdisk pdisk pdisk Spare Spare pdisk pdisk pdisk Figure 19 Pools and Hdisks across Enclosures Chapter 5 Hot Spare Manageme...

Page 70: ...sure This method uses a different hot spare disk drive to protect each member of the array Pool A2 Pool A3 hdisk hdisk Pool A1 Enclosure 1 Enclosure 2 Enclosure 3 pdisk pdisk pdisk pdisk pdisk pdisk Spare Spare Spare Figure 20 Pools along and Hdisks across Enclosures 50 User s Guide and Maintenance Information ...

Page 71: ...mitted on a single SSA loop When choosing how many disk drives to include in a hot spare pool think about how many disk drives the hot spare is protecting and how much time might elapse before a failed disk drive can be replaced Choosing the Error Threshold Alarm Level for a Hot Spare Pool Normally a hot spare pool reports an error when any hot spare disk drive has been used For some conditions su...

Page 72: ...m a hot spare pool that disk drive moves to pool zero v A hot spare pool can exist only on an SSA loop For example hot spare pool B1 on adapter ssa0 has no physical or logical connection to hot spare pool B1 on adapter ssa1 v A hot spare pool can contain any number of hot spare disk drives For instructions on how to configure hot spare pools see Chapter 6 Using the RAID Array Configurator on page ...

Page 73: ...1 3 2 2 1 full pool_B1 6 1 1 1 full F1 Help F2 Refresh F3 Cancel F6 Command F8 Image F9 Shell F10 Exit Find n Find Next The normal operating state for a hot spare pool is Full Any other state indicates that a problem exists or some configuration actions are required The possible states are Full The number of hot spare disk drives that are in the pool is equal to the number of hot spare disk drives...

Page 74: ...use an error to be logged If you removed a disk drive from the configuration on purpose 1 Select Change Show Delete a Hot Spare Pool from the smit ssaraid menu see Adding Disks to or Removing Disks from a Hot Spare Pool on page 86 2 Select the reduced hot spare pool 3 Verify that the contents of the pool are as required 4 Press Enter If you have exchanged a failed disk drive you might now want to ...

Page 75: ... spare disk drives or as free disk drives The hot spare pools however are no longer configured as intended To correct the configuration 1 Select List Components in a Hot Spare Pool see Listing the Disks That Are in a Hot Spare Pool on page 80 2 Select the mixed hot spare pool 3 From the displayed list note the number of the pdisk that has a status of wrong_pool 4 Note the number of the hdisk to wh...

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Page 77: ...This chapter has three main parts v Installing and Configuring SSA RAID Arrays on page 58 v Dealing with RAID Array Problems on page 89 v Using Other Configuration Functions on page 97 Note If you select a List function from a SMIT menu and no resource of the required type exists the following error pop up window might be displayed Change Member Disks in an SSA RAID Array Move cursor to desired it...

Page 78: ...mmands you use If you send the smit command from a graphics terminal however the menus are displayed slightly differently from those shown in this book If you are not familiar with the selection of items from the graphics versions of the menus use the smitty command The menus will then appear as shown in this book 2 Different microcode levels might cause slightly different versions of the menus to...

Page 79: ...omponents in a Hot Spare Pool Add a Hot Spare Pool Add an SSA RAID Array Delete an SSA RAID Array Change Show Attributes of an SSA RAID Array Change Member Disks in an SSA RAID Array Change Show Use of an SSA Physical Disk Change Use of Multiple SSA Physical Disks Change Show Delete a Hot Spare Pool Array Copy Services F1 Help F2 Refresh F3 Cancel F8 Image F9 Shell F10 Exit Enter Do From the follo...

Page 80: ...s List All SSA RAID Arrays Connected to a RAID Manager List Status Of All Defined SSA RAID Arrays List Identify SSA Physical Disks List Delete Old RAID Arrays Recorded in an SSA RAID Manager List Status of Hot Spare Pools List Status of Hot Spare Protection for an SSA RAID Array List Components in a Hot Spare Pool Add a Hot Spare Pool SSA RAID Manager Move cursor to desired item and press Enter ss...

Page 81: ... Connected to a RAID Manager List Status Of All Defined SSA RAID Arrays List Identify SSA Physical Disks List Delete Old RAID Arrays Recorded in an SSA RAID Manager List Status of Hot Spare Pools RAID Array Type Move cursor to desired item and press Enter raid_0 RAID 0 array raid_1 RAID 1 array raid_5 RAID 5 array raid_10 RAID 10 array F1 Help F2 Refresh F3 Cancel F8 Image F10 Exit Enter Do Find n...

Page 82: ...ry fields Press Enter AFTER making all desired changes Entry Fields SSA RAID Manager ssa0 RAID Array Type raid_0 Member Disks Allow Page Splits yes Enable Fast Write no F1 Help F2 Refresh F3 Cancel F4 List F5 Reset F6 Command F7 Edit F8 Image F9 Shell F10 Exit Enter Do For the meanings of the fields see page 66 62 User s Guide and Maintenance Information ...

Page 83: ..._1 Primary Disk Secondary Disk Split Array Resolution Primary Enable Use of Hot Spares yes Choose Hot Spare only from Preferred Pool no Allow Hot Spare Splits no Allow Page Splits yes Initial Rebuild no Enable Fast Write no F1 Help F2 Refresh F3 Cancel F4 List F5 Reset F6 Command F7 Edit F8 Image F9 Shell F10 Exit Enter Do For the meanings of the fields see page 66 Chapter 6 Using the RAID Array C...

Page 84: ... RAID Manager ssa0 RAID Array Type raid_5 Member Disks Strip Size KB 64 Enable Use of Hot Spares yes Choose Hot Spare only from Preferred Pool no Allow Page Splits yes Enable Fast Write no F1 Help F2 Refresh F3 Cancel F4 List F5 Reset F6 Command F7 Edit F8 Image F9 Shell F10 Exit Enter Do For the meanings of the fields see page 66 64 User s Guide and Maintenance Information ...

Page 85: ...ry Disks Secondary Disks Strip Size KB 16 Split Array Resolution Primary Enable Use of Hot Spares yes Choose Hot Spare only from Preferred Pool no Allow Hot Spare Splits no Allow Page Splits yes Initial Rebuild no Enable Fast Write no F1 Help F2 Refresh F3 Cancel F4 List F5 Reset F6 Command F7 Edit F8 Image F9 Shell F10 Exit Enter Do For the meanings of the fields see page 66 Chapter 6 Using the R...

Page 86: ...f an even numbered quantity 4 through 16 of disk drives that are in the same loop The minimum RAID 10 array consists of two primary and two secondary disk drives The data that is contained on the primary disk drives is a mirror copy of the data that is contained on the secondary disk drives Ensure that you choose a quantity of primary disk drives that matches the quantity of secondary disk drives ...

Page 87: ...mber disk drives of the array These actions increase the general speed of write operations to the array although the pages are written in a random sequence If you disable this option the data is written sequentially but the general speed of write operations is decreased The sequence in which data is written to the array might be critical to the program that is using the data if an error occurs dur...

Page 88: ...pe raid_5 Member Disks Enable Use of Hot Spares yes Member Disks Move cursor to desired item and press F7 ONE OR MORE items can be selected Press Enter AFTER making all selections Disks in Loop B are pdisk0 0004AC506C2900D free n a 4 5GB Physical Disk pdisk1 0004AC5119E000D free n a 4 5GB Physical Disk pdisk2 0004AC7C00E800D free n a 4 5GB Physical Disk pdisk3 0004AC9C00E700D free n a 1 1GB Physic...

Page 89: ...e four disk drives pdisk0 pdisk1 pdisk2 and pdisk3 that are shown on the screen in step 5 on page 68 all four disk drives are assigned as 1 1 GB disk drives because pdisk3 is a 1 1 GB disk drive If you use disk drives of various sizes therefore you waste some storage size Attention When the array has been created you can use it You might however prefer to wait until the array state changes from Re...

Page 90: ...ll Defined SSA RAID Arrays List All Supported SSA RAID Arrays List All SSA RAID Arrays Connected to a RAID Manager List Status Of All Defined SSA RAID Arrays List Identify SSA Physical Disks List Delete Old RAID Arrays Recorded in an SSA RAID Manager List Status of Hot Spare Pools List Status of Hot Spare Protection for an SSA RAID Array List Components in a Hot Spare Pool SSA RAID Array Move curs...

Page 91: ...anager List Status of Hot Spare Pools List Status of Hot Spare Protection for an SSA RAID Array List Components in a Hot Spare Pool ARE YOU SURE Continuing may delete information you may want to keep This is your last chance to stop before continuing Press Enter to continue Press Cancel to return to the application F1 Help F2 Refresh F3 Cancel F8 Image F10 Exit Enter Do Find n Find Next 4 At the p...

Page 92: ...pdisk0 00022123DFHC00D member n a 4 5G Physical d pdisk1 0004AC5119E000D member n a 1 1G Physical d pdisk2 0004AC5119E000D member n a 1 1G Physical d pdisk3 08005AEA003500D member n a 4 5G Physical d pdisk4 08005AEA030D00D member n a 2 3G Physical d pdisk5 08005AEA080100D member n a 4 5G Physical d pdisk7 08005AEA087A00D member n a 4 5G Physical d SSA physical disks which are hot spares pdisk6 080...

Page 93: ...lds SSA RAID Manager ssa0 SSA physical disk pdisk6 CONNECTION address 08005AEA080800D Current use Hot Spare Disk F1 Help F2 Refresh F3 Cancel F4 List F5 Reset F6 Command F7 Edit F8 Image F9 Shell F10 Exit Enter Do Move the cursor to Current Use and press the List key Note If the Current Use field shows that the disk drive is owned by an array you cannot change that use 4 Select Hot Spare Disk in t...

Page 94: ...s List All SSA RAID Arrays Connected to a RAID Manager List Status Of All Defined SSA RAID Arrays List Identify SSA Physical Disks List Delete Old RAID Arrays Recorded in an SSA RAID Manager List Status of Hot Spare Pools SSA RAID Manager Move cursor to desired item and press F7 ONE OR MORE items can be selected Press Enter AFTER making all selections ssa0 Available 04 06 IBM SSA 160 SerialRAID Ad...

Page 95: ...pool Components The number of array member disk drives that the hot spare disk drives in the pool are protecting Spares The number of hot spare disk drives that are now in the pool Configured The number of hot spare disk drives that were in the pool when it was created or changed Minimum The value that is selected to be the minimum number of hot spare disk drives that can exist in a pool before an...

Page 96: ...The number of hot spare disk drives that are in the pool is less than the specified number of hot spare disk drives for that pool inconsistent Configuration data for the hot spare pool is saved on all hot spare disk drives The hot spare disk drives that are in the pool however do not all contain the same configuration data mixed An array that is in this pool has used a hot spare disk drive that is...

Page 97: ...D Arrays List All SSA RAID Arrays Connected to a RAID Manager List Status Of All Defined SSA RAID Arrays List Identify SSA Physical Disks List Delete Old RAID Arrays Recorded in an SSA RAID Manager List Status of Hot Spare Pools SSA RAID Manager Move cursor to desired item and press F7 ONE OR MORE items can be selected Press Enter AFTER making all selections ssa0 Available 04 06 IBM SSA 160 Serial...

Page 98: ...rive This value is useful to know if you have assigned a hot spare disk drive to a pool but the array member disk drive is too large to be protected by the hot spare disk drive Pool The pool to which the array member disk drive is assigned Protected If set to yes this field indicates that if the array member disk drive fails a hot spare disk drive is available to replace it That hot spare disk dri...

Page 99: ...B disk drives and one 18 GB disk drive the size that is assigned to each array member disk drive is 9 GB The 18 GB disk drive can still be protected by a 9 GB hot spare disk drive wrong_pool This member disk drive of the array has been replaced with a hot spare disk drive from another pool This action has occurred because no hot spare disk drive was available in this pool when the array member dis...

Page 100: ... Supported SSA RAID Arrays List All SSA RAID Arrays Connected to a RAID Manager List Status Of All Defined SSA RAID Arrays List Identify SSA Physical Disks List Delete Old RAID Arrays Recorded in an SSA RAID Manager List Status of Hot Spare Pools List Status of Hot Spare Protection for an SSA RAID Array List Components in a Hot Spare Pool Add a Hot Spare Pool SSA RAID Manager Move cursor to desire...

Page 101: ...t F8 Image F10 Exit F Enter Do Find n Find Next Select the hot spare pool whose disk drives you want to list 4 The pool status is displayed COMMAND STATUS Command OK stdout yes stderr no Before command completion additional instructions may appear below ssa1 pool_B2 Component Location Size Status hdisk4 raid_10 pdisk13 04 02 REGY 06 P 18 2GB good pdisk3 04 02 REGY 05 P 9 2GB good pdisk7 04 02 REGY...

Page 102: ...in the pool Note The size of the member disk drive is not the physical size of the disk drive but the size that the array manager assigns to it For example if a RAID 10 array is created from three 9 GB disk drives and one 18 GB disk drive the size that is assigned to each array member disk drive is 9 GB The 18 GB disk drive can still be protected by a 9 GB hot spare disk drive wrong_pool This memb...

Page 103: ...t All Supported SSA RAID Arrays List All SSA RAID Arrays Connected to a RAID Manager List Status Of All Defined SSA RAID Arrays List Identify SSA Physical Disks List Delete Old RAID Arrays Recorded in an SSA RAID Manager List Status of Hot Spare Pools List Status of Hot Spare Protection for an SSA RAID Array List Components in a Hot Spare Pool Add a Hot Spare Pool SSA RAID Manager Move cursor to d...

Page 104: ...ool SSA Loops Move cursor to desired item and press Enter Loop A Loop B F1 Help F2 Refresh F3 Cancel F7 Select F8 Image F10 Exit F Enter Do Find n Find Next Select the loop on which you want to create the hot spare pool 4 The Hot Spare Pool Creation menu is displayed Add a Hot Spare Pool Type or select values in entry fields Press Enter AFTER making all desired changes Entry Fields SSA RAID Manage...

Page 105: ...g all selections SSA physical disks that are members of an array hdisk4 raid_10 pdisk13 AC7AAB76 04 02 REGY 06 P 18 2GB good pdisk3 AC7AA0B2 04 02 REGY 05 P 9 2GB good pdisk7 AC7AA0BD 04 02 REGY 01 P 9 2GB good SSA physical disks that are hot spare disks pdisk9 AC7AA2D6 04 02 REGY 02 P 9 2GB SSA physical disks that are free F1 Help F2 Refresh F3 Cancel F1 F7 Select F8 Image F10 Exit F5 Enter Do Fi...

Page 106: ... List All Defined SSA RAID Arrays List All Supported SSA RAID Arrays List All SSA RAID Arrays Connected to a RAID Manager List Status Of All Defined SSA RAID Arrays List Identify SSA Physical Disks List Delete Old RAID Arrays Recorded in an SSA RAID Manager List Status of Hot Spare Pools List Status of Hot Spare Protection for an SSA RAID Array List Components in a Hot Spare Pool SSA RAID Manager ...

Page 107: ...SA RAID Arrays Connected to a RAID Manager SSA Hot Spare Pools Move cursor to desired item and press Enter Hot Spare Pools in Loop A are pool_A1 pool_A2 Hot Spare Pools in Loop B are pool_B1 pool_B2 F1 Help F2 Refresh F3 Cancel F7 Select F8 Image F10 Exit F Enter Do Find n Find Next Select the hot spare pool that you want to change Chapter 6 Using the RAID Array Configurator 87 ...

Page 108: ... is in the same format as the list that is used when a hot spare pool is created 2 Select the member disk drives to add to the pool and press Enter 3 If necessary change the Hot Spares Minimum field 4 Press Enter v To remove disk drives from the pool 1 Select Components to Remove and press the List key A list of disk drives that are now in the pool is displayed 2 Select the member disk drives that...

Page 109: ...ill possible its Current Use attribute is changed from Member of an SSA RAID Array to Rejected For all other changes to the use of a disk drive you must use either the ssaraid commands or the SMIT menus Notes 1 Although this book always refers to the smitty commands you can use either the smitty command or the smit command The procedures that you follow remain the same whichever of the two command...

Page 110: ... Disks List Delete Old RAID Arrays Recorded in an SSA RAID Manager List Status of Hot Spare Pools List Status of Hot Spare Protection for an SSA RAID Array List Components in a Hot Spare Pool Add a Hot Spare Pool Add an SSA RAID Array Delete an SSA RAID Array Change Show Attributes of an SSA RAID Array Change Member Disks in an SSA RAID Array Change Show Use of an SSA Physical Disk Change Use of M...

Page 111: ...ng procedure 1 For fast path type smitty lfssaraid and press Enter Otherwise a Select List Identify SSA Physical Disks from the SSA RAID Arrays menu b Select List Rejected Array Disks 2 A list of adapters is displayed in a window List Identify SSA Physical Disks Move cursor to desired item and press Enter List Disks in an SSA RAID Array List Hot Spares List Rejected Array Disks List Array Candidat...

Page 112: ...d disk drives against other error reports to find out why the disk drive was rejected from the array 5 If you know the physical location of the rejected disk drive go to step 12 on page 93 Otherwise go to step 6 to identify the rejected disk drive 6 For fast path type smitty ifssaraid and press Enter Otherwise a Return to the List Identify SSA Physical Disks menu b Select Identify Rejected Array D...

Page 113: ...ave selected 12 If the disk drive was rejected from the array because the disk drive itself has failed go to step 13 on page 94 If the disk drive was rejected from the array because some other part has failed for example a power supply unit or an SSA cable a Correct the problem or call your service representative b Add the disk drive to the array see Adding a Disk Drive to an SSA RAID Array on pag...

Page 114: ...g disk drive for a new one see the Operator Guide or Service Guide for the unit 14 If you are going to install a replacement disk drive go to Installing a Replacement Disk Drive on page 95 94 User s Guide and Maintenance Information ...

Page 115: ...dure to add the new disk drive to the array 3 For fast path type smitty exssaraid and press Enter Otherwise a Select Change Member Disks of an SSA RAID Array from the SSA RAID Arrays menu b Select Swap Members of an SSA RAID Array 4 A list of arrays is displayed Change Member Disks of an SSA RAID Array Move cursor to desired item and press Enter Remove a Disk from an SSA RAID Array Add a Disk to a...

Page 116: ...d F7 Edit F8 Image F9 Shell F10 Exit Enter Do 6 Select Disk to Remove 7 Press the List key to display the disk drive to remove If the disk drive that you are replacing has been rejected by the array that disk drive is listed as BlankReservedZ 8 Select the required disk drive and press Enter 9 Select Disk to Add 10 Press the List key to display the disk drive to add Disk drives that are free or hot...

Page 117: ...ocedures that you follow remain the same whichever of the two commands you use If you send the smit command from a graphics terminal however the menus are displayed slightly differently from those shown in this book If you are not familiar with the selection of items from the graphics versions of the menus use the smitty command The menus will then appear as shown in this book 2 If you use fast pa...

Page 118: ...ol Add an SSA RAID Array Delete an SSA RAID Array Change Show Attributes of an SSA RAID Array Change Member Disks in an SSA RAID Array Change Show Use of an SSA Physical Disk Change Use of Multiple SSA Physical Disks Change Show Delete a Hot Spare Pool F1 Help F2 Refresh F3 Cancel F8 Image F9 Shell F10 Exit Enter Do From the following list find the option that you want and go to the place that is ...

Page 119: ...isting Old RAID Arrays Recorded in an SSA RAID Manager on page 131 Deleting an Old RAID Array Recorded in an SSA RAID Manager on page 133 v Changing or Showing the Attributes of an SSA RAID Array on page 135 v Changing Member Disks in an SSA RAID Array on page 137 Removing a Disk Drive from an SSA RAID Array on page 138 Adding a Disk Drive to an SSA RAID Array on page 140 Swapping Members of an SS...

Page 120: ...rays from the SSA RAID Arrays menu 2 A list of defined arrays is displayed COMMAND STATUS Command OK stdout yes stderr no Before command completion additional instructions may appear below hdisk3 095231779F0737K good 3 4G RAID 5 array hdisk4 09523173A02137K good 3 4G RAID 5 array F1 Help F2 Refresh F3 Cancel F6 Command F8 Image F9 Shell F10 Exit Find n Find Next 100 User s Guide and Maintenance In...

Page 121: ...select List All Supported SSA RAID Arrays from the SSA RAID Arrays menu 2 A list of supported arrays is displayed COMMAND STATUS Command OK stdout yes stderr no Before command completion additional instructions may appear below raid_0 RAID 0 array raid_5 RAID 5 array F1 Help F2 Refresh F3 Cancel F6 Command F8 Image F9 Shell F10 Exit Find n Find Next Chapter 6 Using the RAID Array Configurator 101 ...

Page 122: ...Supported SSA RAID Arrays List All SSA RAID Arrays Connected to a RAID Manager List Status Of All Defined SSA RAID Arrays List Identify SSA Physical Disks List Delete Old RAID Arrays Recorded in an SSA RAID Manager List Status of Hot Spare Pools List Status of Hot Spare Protection for an SSA RAID Array List Components in a Hot Spare Pool Add a Hot Spare Pool SSA RAID Manager Move cursor to desired...

Page 123: ...e command completion additional instructions may appear below hdisk4 09523173A02137K good 3 4G RAID 5 array hdisk3 095231779F0737K good 3 4G RAID 5 array F1 Help F2 Refresh F3 Cancel F6 Command F8 Image F9 Shell F10 Exit Find n Find Next Chapter 6 Using the RAID Array Configurator 103 ...

Page 124: ...Defined SSA RAID Arrays List Identify SSA Physical Disks List Delete Old RAID Arrays Recorded in an SSA RAID Manager List Status of Hot Spare Pools List Status of Hot Spare Protection for an SSA RAID Array RAID Array Type Move cursor to desired item and press Enter raid_1 raid_5 raid_10 F1 Help F2 Refresh F3 Cancel F8 Image F10 Exit Enter Do Find n Find Next Select the type of RAID array for which...

Page 125: ... stdout yes stderr no Before command completion additional instructions may appear below Unsynced Parity Strips Unbuilt Data Strips hdisk3 0 0 hdisk4 0 0 F1 Help F2 Refresh F3 Cancel F6 Command F8 Image F9 Shell F10 Exit Find n Find Next Chapter 6 Using the RAID Array Configurator 105 ...

Page 126: ...d degraded The status of one or more mirrored pairs is degraded rebuilding The status of one or more mirrored pairs is rebuilding No mirrored pair is exposed or degraded offline One of the following conditions exists v The status of one or more mirrored pairs is offline v The first two member disk drives of the primary half are missing and the Split Array Resolution flag is set to Primary v The fi...

Page 127: ...sk drive of a mirrored pair is missing or has failed and a write operation has been issued to the working member disk drive rebuilding A failed member disk drive in a mirrored pair has been exchanged and data is rebuilding offline Both member disk drives of a mirrored pair are missing or have failed Chapter 6 Using the RAID Array Configurator 107 ...

Page 128: ...dentify Array Candidate Disks Identify System Disks Cancel all SSA Disk Identifications F1 Help F2 Refresh F3 Cancel F8 Image F9 Shell F10 Exit Enter Do Select the option that you want and go to the instructions for that option v Listing the Disk Drives in an SSA RAID Array on page 109 v Listing Hot Spare Disk Drives on page 111 v Listing Rejected Array Disk Drives on page 113 v Listing Array Cand...

Page 129: ...sor to desired item and press Enter List Disks in an SSA RAID Array List Hot Spares List Rejected Array Disks List Array Candidate Disks List System Disks Identify Disks in an SSA RAID Array Identify Hot Spares Identify Rejected Array Disks Identify Array Candidate Disks SSA RAID Array Move cursor to desired item and press Enter hdisk3 095231779F0737K good 3 4G RAID 5 array hdisk4 09253173A02137K ...

Page 130: ...sk1 0004AC5119E000D member present 1 1G Physical disk pdisk4 08005AEA030D00D member present 2 3G Physical disk pdisk7 08005AEA087A00D member present 4 5G Physical disk pdisk8 08005AEA098100D member not_present n a Physical disk F1 Help F2 Refresh F3 Cancel F6 Command F8 Image F9 Shell F10 Exit Find n Find Next 110 User s Guide and Maintenance Information ...

Page 131: ...red item and press Enter List Disks in an SSA RAID Array List Hot Spares List Rejected Array Disks List Array Candidate Disks List System Disks Identify Disks in an SSA RAID Array Identify Hot Spares Identify Rejected Array Disks Identify Array Candidate Disks Identify System Disks SSA RAID Manager Move cursor to desired item and press Enter ssa0 Available 00 04 IBM SSA 160 SerialRAID Adapter 1410...

Page 132: ...fore command completion additional instructions may appear below pdisk3 0004AC5119E000D spare n a 1 1G Physical disk pdisk5 08005AEA030D00D spare n a 2 3G Physical disk F1 Help F2 Refresh F3 Cancel F6 Command F8 Image F9 Shell F10 Exit Find n Find Next 112 User s Guide and Maintenance Information ...

Page 133: ...rsor to desired item and press Enter List Disks in an SSA RAID Array List Hot Spares List Rejected Array Disks List Array Candidate Disks List System Disks Identify Disks in an SSA RAID Array Identify Hot Spares Identify Rejected Array Disks Identify Array Candidate Disks Identify System Disks SSA RAID Manager Move cursor to desired item and press Enter ssa0 Available 00 04 IBM SSA 160 SerialRAID ...

Page 134: ...e command completion additional instructions may appear below pdisk3 0004AC5119E000D rejected n a 1 1G Physical disk pdisk5 08005AEA030D00D rejected n a 2 3G Physical disk F1 Help F2 Refresh F3 Cancel F6 Command F8 Image F9 Shell F10 Exit Find n Find Next 114 User s Guide and Maintenance Information ...

Page 135: ...sired item and press Enter List Disks in an SSA RAID Array List Hot Spares List Rejected Array Disks List Array Candidate Disks List System Disks Identify Disks in an SSA RAID Array Identify Hot Spares Identify Rejected Array Disks Identify Array Candidate Disks Identify System Disks SSA RAID Manager Move cursor to desired item and press Enter ssa0 Available 00 04 IBM SSA 160 SerialRAID Adapter 14...

Page 136: ...no Before command completion additional instructions may appear below pdisk3 0004AC5119E000D free 1 1G Physical disk pdisk5 08005AEA030D00D free 2 3G Physical disk F1 Help F2 Refresh F3 Cancel F6 Command F8 Image F9 Shell F10 Exit Find n Find Next 116 User s Guide and Maintenance Information ...

Page 137: ...Move cursor to desired item and press Enter List Disks in an SSA RAID Array List Hot Spares List Rejected Array Disks List Array Candidate Disks List System Disks Identify Disks in an SSA RAID Array Identify Hot Spares Identify Rejected Array Disks Identify Array Candidate Disks Identify System Disks SSA RAID Manager Move cursor to desired item and press Enter ssa0 Available 00 04 IBM SSA 160 Seri...

Page 138: ...Before command completion additional instructions may appear below pdisk3 0004AC5119E000D system 1 1G Physical disk pdisk5 08005AEA030D00D system 2 3G Physical disk F1 Help F2 Refresh F3 Cancel F6 Command F8 Image F9 Shell F10 Exit Find n Find Next 118 User s Guide and Maintenance Information ...

Page 139: ...s List Array Candidate Disks List System Disks Identify Disks in an SSA RAID Array Identify Hot Spares Identify Rejected Array Disks Identify Array Candidate Disks SSA RAID Array Move cursor to desired item and press Enter hdisk3 095231779F0737K good 3 4G RAID 5 array hdisk4 09253173A02137K good 3 4G RAID 5 array F1 Help F2 Refresh F3 Cancel F8 Image F10 Exit Enter Do Find n Find Next Select the a...

Page 140: ...s Flash Disk Identification Lights yes F1 Help F2 Refresh F3 Cancel F4 List F5 Reset F6 Command F7 Edit F8 Image F9 Shell F10 Exit Enter Do 4 Select yes in the Flash Disk Identification Lights field 5 Press the List key to list the disk drives 6 From the displayed list select the disk drives that you want to identify The Check light flashes on each disk drive that you have selected 120 User s Guid...

Page 141: ...sired item and press Enter List Disks in an SSA RAID Array List Hot Spares List Rejected Array Disks List Array Candidate Disks List System Disks Identify Disks in an SSA RAID Array Identify Hot Spares Identify Rejected Array Disks Identify Array Candidate Disks SSA RAID Array Move cursor to desired item and press Enter hdisk3 095231779F0737K good 3 4G RAID 5 array hdisk4 09253173A02137K good 3 4G...

Page 142: ...tification Lights yes F1 Help F2 Refresh F3 Cancel F4 List F5 Reset F6 Command F7 Edit F8 Image F9 Shell F10 Exit Enter Do 4 Select yes in the Flash Disk Identification Lights field 5 Press the List key to list the disk drives 6 From the displayed list select the disk drives that you want to identify The Check light flashes on each disk drive that you have selected 122 User s Guide and Maintenance...

Page 143: ...ursor to desired item and press Enter List Disks in an SSA RAID Array List Hot Spares List Rejected Array Disks List Array Candidate Disks List System Disks Identify Disks in an SSA RAID Array Identify Hot Spares Identify Rejected Array Disks Identify Array Candidate Disks SSA RAID Array Move cursor to desired item and press Enter hdisk3 095231779F0737K good 3 4G RAID 5 array hdisk4 09253173A02137...

Page 144: ...sk Identification Lights yes F1 Help F2 Refresh F3 Cancel F4 List F5 Reset F6 Command F7 Edit F8 Image F9 Shell F10 Exit Enter Do 4 Select yes in the Flash Disk Identification Lights field 5 Press the List key to list the disk drives 6 From the displayed list select the disk drives that you want to identify The Check light flashes on each disk drive that you have selected 124 User s Guide and Main...

Page 145: ...o desired item and press Enter List Disks in an SSA RAID Array List Hot Spares List Rejected Array Disks List Array Candidate Disks List System Disks Identify Disks in an SSA RAID Array Identify Hot Spares Identify Rejected Array Disks Identify Array Candidate Disks Identify System Disks SSA RAID Manager Move cursor to desired item and press Enter ssa0 Available 00 04 IBM SSA 160 SerialRAID Adapte...

Page 146: ...isk Identification Lights yes F1 Help F2 Refresh F3 Cancel F4 List F5 Reset F6 Command F7 Edit F8 Image F9 Shell F10 Exit Enter Do 4 Select yes in the Flash Disk Identification Lights field 5 Press the List key to list the disk drives 6 From the displayed list select the disk drives that you want to identify The Check light flashes on each disk drive that you have selected 126 User s Guide and Mai...

Page 147: ...sks Move cursor to desired item and press Enter List Disks in an SSA RAID Array List Hot Spares List Rejected Array Disks List Array Candidate Disks List System Disks Identify Disks in an SSA RAID Array Identify Hot Spares Identify Rejected Array Disks Identify Array Candidate Disks Identify System Disks SSA RAID Manager Move cursor to desired item and press Enter ssa0 Available 00 04 IBM SSA 160 ...

Page 148: ...ification Lights yes F1 Help F2 Refresh F3 Cancel F4 List F5 Reset F6 Command F7 Edit F8 Image F9 Shell F10 Exit Enter Do 4 Select yes in the Flash Disk Identification Lights field 5 Press the List key to list the disk drives 6 From the displayed list select the disk drives that you want to identify The Check light flashes on each disk drive that you have selected 128 User s Guide and Maintenance ...

Page 149: ...ations For fast path type smitty ssa_identify_cancel and press Enter Otherwise 1 Select List Identify SSA Physical Disks from the SSA RAID Arrays menu 2 Select Cancel all SSA Disk Identifications The Check lights of all identified disk drives stop flashing Chapter 6 Using the RAID Array Configurator 129 ...

Page 150: ...ger from the SSA RAID Arrays menu 2 The following menu is displayed List Delete Old RAID Arrays in an SSA RAID Manager Move cursor to desired item and press Enter List Old RAID Arrays Recorded in an SSA RAID Manager Delete an Old RAID Array Recorded in an SSA RAID Manager F1 Help F2 Refresh F3 Cancel F8 Image F9 Shell F10 Exit Enter Do If you want to list the arrays select List Old RAID Arrays Rec...

Page 151: ...agers is displayed in a window List Delete Old RAID Arrays in an SSA RAID Manager Move cursor to desired item and press Enter List Old RAID Arrays Recorded in an SSA RAID Manager Delete an Old RAID Array Recorded in an SSA RAID Manager SSA RAID Manager Move cursor to desired item and press Enter ssa0 Available 00 02 IBM SSA 160 SerialRAID Adapter 14109100 F1 Help F2 Refresh F3 Cancel F8 Image F10 ...

Page 152: ...952314699CE37K 095231469A9337K 095231469B6D37K 095231469C4537K 095231469CEE37K 095231469D7A37K 095231469E2C37K 095231469F7C37K 09523146A42637K 09523146A4B737K MORE 15 F1 Help F2 Refresh F3 Cancel F6 Command F8 Image F9 Shell F10 Exit Find n Find Next 6 If you want to delete any records note the names of those records and go to Deleting an Old RAID Array Recorded in an SSA RAID Manager on page 133 ...

Page 153: ...t of RAID managers is displayed in a window List Delete Old RAID Arrays in an SSA RAID Manager Move cursor to desired item and press Enter List Old RAID Arrays Recorded in an SSA RAID Manager Delete an Old RAID Array Recorded in an SSA RAID Manager SSA RAID Manager Move cursor to desired item and press Enter ssa0 Available 00 02 IBM SSA 160 SerialRAID Adapter 14109100 F1 Help F2 Refresh F3 Cancel ...

Page 154: ... Entry Fields SSA RAID Manager ssa0 Old SSA RAID Array Record to Delete F1 Help F2 Refresh F3 Cancel F4 List F5 Reset F6 Command F7 Edit F8 Image F9 Shell F10 Exit Enter Do Press the List key to list the records 5 From the displayed list select the record that you want to delete and follow the instructions that are given on the screen 134 User s Guide and Maintenance Information ...

Page 155: ...adapter that is listed as adapter_a A list of arrays is displayed in a window SSA RAID Arrays Move cursor to desired item and press Enter List All Defined SSA RAID Arrays List All Supported SSA RAID Arrays List All SSA RAID Arrays Connected to a RAID Manager List Status Of All Defined SSA RAID Arrays List Identify SSA Physical Disks List Delete Old RAID Arrays Recorded in an SSA RAID Manager List ...

Page 156: ...le Use of Hot Spares yes Allow Page Splits yes Current Use System Disk F1 Help F2 Refresh F3 Cancel F4 List F5 Reset F6 Command F7 Edit F8 Image F9 Shell F10 Exit Enter Do Move the cursor to the attribute that you want to change and press the List key 5 A list of options for that attribute is displayed Select the option that you want 6 If you want to change another attribute move the cursor to tha...

Page 157: ...ayed Change Member Disks in an SSA RAID Array Move cursor to desired item and press Enter Remove a Disk From an SSA RAID Array Add a Disk to an SSA RAID Array Swap Members of an SSA RAID Array F1 Help F2 Refresh F3 Cancel F8 Image F9 Shell F10 Exit Enter Do If you have an available disk drive select Swap Members of an SSA RAID Array and go to step 2 on page 142 of Swapping Members of an SSA RAID A...

Page 158: ...s menu b Select Remove a Disk from an SSA RAID Array 2 A list of arrays is displayed in a window Change Member Disks in an SSA RAID Array Move cursor to desired item and press Enter Remove a Disk from an SSA RAID Array Add a Disk to an SSA RAID Array Swap Members of an SSA RAID Array SSA RAID Array Move cursor to desired item and press Enter hdisk3 095231779F0737K good 3 4G RAID 5 array hdisk4 095...

Page 159: ...1779F0737K Disk to Remove F1 Help F2 Refresh F3 Cancel F4 List F5 Reset F6 Command F7 Edit F8 Image F9 Shell F10 Exit Enter Do Press the List key to list the disk drives 4 From the displayed list select the disk drive that you want to remove 5 Physically remove the disk drive from the subsystem see the Operator Guide or Service Guide for the unit 6 Go to Swapping Members of an SSA RAID Array on pa...

Page 160: ...h type smitty addssaraid and press Enter Otherwise a Select Change Member Disks of an SSA RAID Array from the SSA RAID Arrays menu b Select Add a Disk to an SSA RAID Array 2 A list of arrays is displayed in a window Change Member Disks in an SSA RAID Array Move cursor to desired item and press Enter Remove a Disk from an SSA RAID Array Add a Disk to an SSA RAID Array Swap Members of an SSA RAID Ar...

Page 161: ...SA RAID Manager ssa0 SSA RAID Array hdisk3 Connection Address Array Name 09523177F0737K Disk to Add F1 Help F2 Refresh F3 Cancel F4 List F5 Reset F6 Command F7 Edit F8 Image F9 Shell F10 Exit Enter Do Press the List key to list the disk drives 4 From the displayed list select the name of the disk drive that you are adding Chapter 6 Using the RAID Array Configurator 141 ...

Page 162: ...w Change Member Disks of an SSA RAID Array Move cursor to desired item and press Enter Remove a Disk from an SSA RAID Array Add a Disk to an SSA RAID Array Swap Members of an SSA RAID Array SSA RAID Array Move cursor to desired item and press Enter Use arrow keys to scroll hdisk3 095231779F0737K rebuilding 3 4G RAID 5 array hdisk3 09523173A02137K good 3 4G RAID 5 array F1 Help F2 Refresh F3 Cancel...

Page 163: ...ommand F7 Edit F8 Image F9 Shell F10 Exit Enter Do Select Disk to Remove and press the List key 4 From the displayed list select the disk drive that you want to remove and press Enter Note If the disk drive that you are replacing has been removed or the array has rejected it it is listed as BlankReservedZ 5 Select Disk to Add and press the List key 6 From the displayed list select the name of the ...

Page 164: ...tem and press Enter List Disks in an SSA RAID Array List Hot Spares List Rejected Array Disks List Array Candidate Disks List System Disks Identify Disks in an SSA RAID Array Identify Hot Spares Identify Rejected Array Disks Identify Array Candidate Disks Identify System Disks SSA RAID Manager Move cursor to desired item and press Enter ssa0 Available 00 04 IBM SSA 160 SerialRAID Adapter 14109100 ...

Page 165: ...k2 0004AC5119E000D member n a 1 1G Physical d pdisk3 08005AEA003500D member n a 4 5G Physical d pdisk4 08005AEA030D00D member n a 2 3G Physical d pdisk5 08005AEA080100D member n a 4 5G Physical d pdisk7 08005AEA087A00D member n a 4 5G Physical d SSA physical disks which are hot spares pdisk6 08005AEA080800D spare n a 4 5G Physical d F1 Help F2 Refresh F3 Cancel F8 Image F10 Exit Enter Do Find n Fi...

Page 166: ...800D Current use Hot Spare Disk F1 Help F2 Refresh F3 Cancel F4 List F5 Reset F6 Command F7 Edit F8 Image F9 Shell F10 Exit Enter Do If you are only checking the use of the disk drive and do not want to change it go no further with these instructions Otherwise go to step 5 5 Note If the Current Use field shows that the disk drive is owned by an array you cannot change that use Move the cursor to C...

Page 167: ...ursor to desired item and press Enter ssa0 Available 00 04 IBM SSA 160 SerialRAID Adapter 14109100 F1 Help F2 Refresh F3 Cancel F8 Image F10 Exit Enter Do Find n Find Next 3 Select the adapter A list is displayed of the disk drives that are attached to the adapter SSA RAID Arrays SSA Physical Disks Move cursor to desired item and press F7 Use arrow keys to scroll ONE OR MORE items can be selected ...

Page 168: ...hysical Disks Type or select values in entry fields Press Enter AFTER making all desired changes Entry Fields SSA RAID Manager ssa0 SSA physical disk pdisk6 pdisk7 pdisk8 New use System Disks F1 Help F2 Refresh F3 Cancel F4 List F5 Reset F6 Command F7 Edit F8 Image F9 Shell F10 Exit Enter Do 5 If you want to select other uses for other disk drives repeat this procedure for each different use Copyi...

Page 169: ...as raw hdisks you control the 3 Way Copy function from SMIT menus or from ssaraid commands Facilities are provided that allow you to identify suitable candidate disk drives for the copy and to couple those disk drives to the parent array By using SMIT menus or an ssaraid command you can uncouple the copy from the parent array the uncoupled array becomes a new hdisk Before the copy is uncoupled all...

Page 170: ...y and repeat from step 2 Recoupling the copy disk drives to the parent starts a new copy process The terms couple and uncouple which are used in this section have specific meanings couple To attach a copy disk drive to a RAID 1 array or to attach an array of copy disk drives to a RAID 10 array so that data is copied from the RAID 1 or RAID 10 array to the copy array The metadata of the copy array ...

Page 171: ...e the RAID Copy array to your selected parent RAID 1 or RAID 10 array v Copy data from the parent array to the RAID Copy array v Uncouple the RAID Copy array from the parent array v Delete the RAID Copy array when the copy data is no longer required The following examples show how you might create a RAID Copy of a RAID 1 array For these examples the RAID 1 array is called hdisk5 and the RAID manag...

Page 172: ...r RAID copy array is 185439188B4F4CT 3 Couple the RAID Copy array to the parent RAID array Type ssaraid A l ssa2 i couple n hdisk5 a raid_copy 185439188B4F4CT a copy_verify_writes true A message is displayed for example 185439188B4F4CT changed 185439188B4F4CT coupled The copy operation starts immediately the array is coupled If the RAID Copy array already contains a copy of data from another array...

Page 173: ... that to increase the speed of the uncouple operation you suspend fast write caching and flush any cached data to the array Type ssaraid H l ssa2 n hdisk5 a fw_suspended true 6 If copy_status good you can now uncouple the copy array from the parent array Type ssaraid A l ssa2 i uncouple n hdisk5 If the fast write function is enabled for the parent array the uncouple operation checks whether fast w...

Page 174: ...k name for example hdisk6 If you want to configure the RAID Copy array and use a specific hdisk name type mkdev t hdisk p ssar w 185439188B4F4CT l hdiskname where 185439188B4F4CT is the RAID Copy serial number and hdiskname is any hdisk name that you select for example hdisk5copy 9 When you no longer need the data that is on the RAID Copy array you can recouple the RAID Copy array to the parent ar...

Page 175: ...e RAID Copy array v Uncouple the RAID Copy array from the parent array v Delete the RAID Copy array when the copy data is no longer required 1 Select Array Copy Services from the SSA RAID Arrays menu 2 Select Prepare a RAID Array Copy A list of the RAID 1 and RAID 10 arrays that are not coupled to any copy arrays is displayed for example Array Copy Services Move cursor to desired item and press En...

Page 176: ...e operating your RAID array in a split site configuration you might want to select which hot spare pools are to be used for copy disks If you do select Hot spare selection and select your hot spare preference Press the Help key if you need more information about this entry If you want to couple an existing RAID Copy array a Select RAID Copy to be coupled b Either type the name of the RAID Copy arr...

Page 177: ... copied of all RAID 1 and RAID 10 arrays is displayed COMMAND STATUS Command OK stdout yes stderr no Before command completion additional instructions may appear below Array Array Type Coupled Disks Copy State hdisk3 raid_10 None Not Copying 0 hdisk4 raid_10 pdisk8 Copying 73 pdisk9 pdisk10 F1 Help F2 Refresh F3 Cancel F6 Command F8 Image F9 Shell F10 Exit Find n Find Next c When the percentage co...

Page 178: ...ay was uncoupled The displayed output from the uncouple command includes the hdisk name that is assigned to the RAID Copy array 7 When you no longer need the data that is on the RAID Copy array you can recouple the RAID Copy array to the parent array or delete it To delete the RAID Copy array a Select Array Copy Services from the SSA RAID Arrays menu b Select Delete a RAID Array Copy c Select the ...

Page 179: ...he parent volume group and runs the copy operation see Figure 23 When the copy operation has completed and the copy array has been uncoupled the fast write cache if present is temporarily disabled and data is flushed to the physical disk drives The ssa_make_copy command then forces the parent volume group to synchronize The synchronize operation flushes all data from memory to disk and stops all I...

Page 180: ... the RAID Copy array It creates the new volume group renames the file systems and mounts them to new mount points see Figure 24 Figure 24 The RAID Copy Array Uncoupled from the Parent hdisk 160 User s Guide and Maintenance Information ...

Page 181: ... or RAID 10 arrays If any hdisk is of the wrong type the command displays a warning then stops v If you want to copy logical volumes or file systems the command checks whether all the logical volumes are in the same volume group and whether all the hdisks that make up the volume group are RAID 1 or RAID 10 arrays If any logical volume is not in the required volume group or if any hdisk is of the w...

Page 182: ...mory to disk and stops all I O operations 8 Now the copy can be uncoupled from the parent volume group The uncouple process makes a RAID Copy array from the copy disk drives and clears the PVID of the copy disk drive The uncouple process occurs on all hdisks that have been copied it can occur only when all I O operations have stopped The timing is very important here I O operations must be stopped...

Page 183: ...pleted the script an error is reported The external trigger provides a good way to automatically stopping I O at the correct moment If the e flag is used the default filename applies tmp ssa_copy_svs_trigger U Uncouples the copy This command is run only when you want to recreate the copy volume group on another using system When a copy array is uncoupled a new hdisk is created This hdisk contains ...

Page 184: ...y P v vgname ssa_make_copy v vgname Figure 25 shows from left to right v The parent array that contains the source volume group v The empty RAID Copy array coupled to the parent array v The uncoupled RAID Copy array that now contains a copy of the complete new volume group Note that in the copy all names start with fs Figure 25 Copying a Complete Volume Group 164 User s Guide and Maintenance Infor...

Page 185: ...copy of the logical volume Note that in the copy all names start with fs Although the purpose of this job is to copy the logical volume lv_B by default the ssa_make_copy command has copied the complete contents of hdisk hd_1 which includes the logical volume lv_A The logical volume fslv_A cannot be accessed however because its loglv is on hdisk hd_2 and has not been copied If a logical volume has ...

Page 186: ... vgname l lv_A ssa_make_copy v vgname l lv_A or ssa_make_copy P v vgname l lv_A l lv_B ssa_make_copy v vgname l lv_A l lv_B To copy one logical volume by fs name give the commands ssa_make_copy P v vgname f data_fs1 ssa_make_copy v vgname f data_fs1 Although the logical volume lv_B is not shown in two of the commands it is copied because it is stored on the same physical volume as lv_A is When you...

Page 187: ... empty RAID Copy array coupled to the parent array v The uncoupled RAID Copy array that now contains a copy of the logical volume Note that in the copy all names start with fs Figure 27 Copying One Logical Volume or Copying by FS Name 1 Chapter 7 Copying Data from Arrays and from Volume Groups 167 ...

Page 188: ... ssa_make_copy P l lv_C ssa_make_copy l lv_C To copy one logical volume by fs name type ssa_make_copy P f data_fs2 ssa_make_copy f data_fs2 Figure 28 shows from left to right v The parent array that contains the source volume group v The empty RAID Copy array coupled to the parent array v The uncoupled RAID Copy array that now contains a copy of the logical volume Note that in the copy all names s...

Page 189: ...uccessfully 2 On the using system where you want to recreate the copy a Run the cfgmgr command to configure the new hdisks b Give the command ssaraid Il ssan n serial_number z where serial_number is the serial number of the RAID Copy array hdisk for example 014639AB30DC0T A message is displayed for example hdiskx 0146392AB30DC0T good 4 5GB RAID Copy array c To recreate the copy give the command ss...

Page 190: ...e group Give the command ssa_make_copy v vgname 4 Either delete the copy volume group and destroy the RAID Copy array a Give the command ssa_delete_copy v newvgname A b Repeat from step 1 or delete the copy volume group and couple the children back to the parents a Give the command ssa_delete_copy v newvgname C b Repeat from step 2 or delete the volume group and detach the RAID Copy array a Repeat...

Page 191: ...its RAID Copy arrays C Deletes a copy and couples the RAID Copy to its original parents f If the specified volume group is varied off this flag forces the volume group to be exported If the specified volume group is varied on and file systems are mounted this flag attempts to unmount the file systems Chapter 7 Copying Data from Arrays and from Volume Groups 171 ...

Page 192: ...D Arrays List All Supported SSA RAID Arrays List All SSA RAID Arrays Connected to a RAID Manager List Status Of All Defined SSA RAID Arrays List Identify SSA Physical Disks List Delete Old RAID Arrays Recorded in an SSA RAID Manager List Status of Hot Spare Pools List Status of Hot Spare Protection for an SSA RAID Array List Components in a Hot Spare Pool Add a Hot Spare Pool Add an SSA RAID Array...

Page 193: ...epare a RAID Array Copy Select this option if you want to make a copy of a RAID array If the RAID array is a member of an active volume group select Prepare a Volume Group Logical Volumes or Filesystems Copy When this option is selected an array selection menu is displayed and is followed by the Prepare a Copy menu that is shown in Prepare a Copy on page 175 Prepare Volume Group Logical Volumes or...

Page 194: ... this option to find the parent array and the creation date of each array of type raid_copy See List All Uncoupled Copies on page 181 for a description of the output data List all Uncoupled Volume Groups Select this option to find the parent array and the creation date of each array in a volume group that contains arrays of type raid_copy See List All Uncoupled Volume Groups on page 182 for a desc...

Page 195: ...he fields are Array to be copied The array that you selected as the source data for the copy Number of disk drives required The number of disk drives that must be coupled to the array to permit a copy to be performed Minimum disk drive size required The effective size of each member disk drive of the array Each disk drive that is coupled to the array must be at least this size If larger disk drive...

Page 196: ...hell script see Using the ssaraid Command to Create a RAID Copy Array from a RAID 1 or RAID 10 Array on page 151 RAID copy to be coupled The name of the existing RAID copy to be used Press the List key to list the uncoupled copies that you can use to create the new copy Leave this field blank if you are going to select Disk drives to be coupled Disk drives to be coupled A list of disk drives to be...

Page 197: ...5 Reset F6 Command F7 Edit F8 Image F9 Shell F10 Exit Enter Do The meanings of the fields are Volume Group The name of the volume group from which this copy was taken New Volume Group name The name of this copy of the volume group In this field enter the name of the new volume group If this field remains blank a default volume group name is used Logical Volume prefix The prefix that is added to th...

Page 198: ...uncoupled If you select read only the file systems are mounted for read only when the copy is uncoupled Synchronize the file systems Select this option to schedule a synchronization operation before the copy is uncoupled 178 User s Guide and Maintenance Information ...

Page 199: ...ge F9 Shell F10 Exit Find n Find Next The columns of information displayed on the screen have the following meanings Array The hdisk name of the RAID array This field contains the array serial number if the array is not configured Array Type The type of array listed This is raid_1 or raid_10 Coupled Disks Disk drives to which the array data is being copied Copy State The operational state of the a...

Page 200: ...et contain an exact copy of the data that is on the array Degraded A copy has been created but one or more coupled disk drives are missing or have failed If missing disk drives are replaced or exchanged for new disk drives the copy operation continues 180 User s Guide and Maintenance Information ...

Page 201: ...nformation displayed on the screen have the following meanings Copy The name of the RAID Copy array Status The status of the RAID Copy array Valid values for status are Good All the array components are present and operational Offline One or more array members are missing or have failed Unknown A RAID Copy array has been created but has not been coupled to an array An hdisk cannot be created from ...

Page 202: ...ns of information displayed on the screen have the following meanings Copy The new volume group name that was created when the copy of the parent volume group was uncoupled Under the volume group name is listed the RAID arrays that were copied as part of that volume group Status The status of the RAID Copy array Valid values for status are Good All the array components are present and operational ...

Page 203: ...List All Uncoupled Volume Groups Delete a RAID Array Copy Delete a Volume Group Logical Volumes or Filesystems Copy Delete a RAID Array Copy Move cursor to desired item and press Enter hdisk3 raid_1 Good 100 hdisk9 raid_copy Good F1 Help F2 Refresh F3 Cancel F8 Image F10 Exit Enter Do F1 Find n Find Next F9 If you select a raid_1 or a raid_10 array from the pop up menu and press Enter the coupled ...

Page 204: ...d press Enter Use arrow keys to scroll fsmyvg01 hdisk7 good hdisk3 Fri May 12 13 2 hdisk8 good hdisk4 Fri May 12 13 2 fsmyvg01 hdisk9 good hdisk5 Fri May 12 14 1 hdisk10 good hdisk6 Fri May 12 14 1 F1 Help F2 Refresh F3 Cancel F8 Image F10 Exit Enter Do F1 Find n Find Next F9 If you select either the volume group name or any hdisk in that volume group all the disk drives in the volume group are se...

Page 205: ...and pdisks that are in each array in the volume group change to free disk drives Data on the volume group is no longer accessible Delete and Recouple The volume group name is removed Each array that is in the volume group is recoupled to its original parent Force Yes No If the specified volume group is varied off yes forces the script to export the volume group If the specified volume group is var...

Page 206: ...Use of Hot Spares yes MORE 4 F1 Help F2 Refresh F3 Cancel F4 List F5 Reset F6 Command F7 Edit F8 Image F9 Shell F10 Exit Enter Do The meanings of the additional fields are Copy State The operational state of the array copy Not Copying No copy is being created for this array Good The coupled disk drives contain an exact copy of the data that is on the array The copy must be in the Good state before...

Page 207: ...nt Array hdisk2 Copy Uncoupled Thu May 11 09 31 11 20 Allow Page Splits yes Current Use System Disk F1 Help F2 Refresh F3 Cancel F4 List F5 Reset F6 Command F7 Edit F8 Image F9 Shell F10 Exit Enter Do The meanings of the additional fields are State The status of the RAID Copy array Valid values for status are Good All the array components are present and operational Offline One or more array membe...

Page 208: ...ood pdisk17 good F1 Help F2 Refresh F3 Cancel F6 Command F8 Image F9 Shell F10 Exit Find n Find Next Status data is given for the array and each disk drive in the array The status values for the array are Good All the array components are present and operational Offline One or more array members are missing or have failed Unknown A RAID Copy array has been created but has not been coupled to an ar...

Page 209: ...ired changes Entry Fields SSA RAID Manager ssa1 SSA RAID Array hdisk2 Primary Disks Secondary Disks Coupled Disks Flash Disk Identification Lights yes F1 Help F2 Refresh F3 Cancel F4 List F5 Reset F6 Command F7 Edit F8 Image F9 Shell F10 Exit Enter Do 1 For the primary secondary and coupled disk drives press the List key to list the disk drives that you want to identify 2 From the menu shown selec...

Page 210: ...ve cursor to desired item and press Enter Primary Disks pdisk0 AC7AA078 04 07 P present 9 1GB pdisk6 AC7AA8A4 04 07 P present 9 1GB Secondary Disks pdisk9 AC7AD176 04 07 P present 9 1GB pdisk10 AC7AE3C9 04 07 P rebuilding 9 1GB Coupled Disks pdisk11 AC7AE417 04 07 P present 9 1GB pdisk12 AC7AE41C 04 07 P present 9 1GB F1 Help F2 Refresh F3 Cancel F1 F8 Image F10 Exit Enter Do F5 Find n Find Next F...

Page 211: ... to desired item and press Enter Primary Disks pdisk0 AC7AA078 04 07 P present 9 1GB pdisk6 AC7AA8A4 04 07 P present 9 1GB Secondary Disks pdisk9 AC7AD176 04 07 P present 9 1GB pdisk10 AC7AE3C9 04 07 P present 9 1GB Coupled Disks pdisk11 AC7AE417 04 07 P present 9 1GB pdisk12 AC7AE41C 04 07 P present 9 1GB F1 Help F2 Refresh F3 Cancel F1 F8 Image F10 Exit Enter Do F5 Find n Find Next F9 The status...

Page 212: ...192 User s Guide and Maintenance Information ...

Page 213: ...y The Split Array Resolution flag determines whether the primary or secondary side of the array can operate when some of the configuration disks are not available Normally the Split Array Resolution flag is reset When the Split Array Resolution flag is reset and the secondary configuration disk can be accessed but no primary configuration disk drive can be accessed by an adapter the array goes int...

Page 214: ...n disk drive is working The adapter microcode automatically sets the Split Array Resolution flag The array goes into the Offline state for the following errors or reconfiguration v Both primary configuration disks are missing and less than all the managing adapters on the list are visible Split Array Resolution needs to be set before operations to the array can continue v The secondary disk drives...

Page 215: ...ing system v One half of the array is not present v The adapter is not known to the remaining half of the array v The split and join procedure was not performed correctly This section describes those problems gives examples of possible causes and recommends recovery actions One Half of the Array Is Not Present This condition produces SRN 48750 This type of problem can be caused by v Disk drive fai...

Page 216: ...state v A write operation to the array occurs before the missing primary disk drive becomes available again Under this condition If a hot spare disk drive is available that hot spare disk drive automatically becomes the new primary disk drive and the array goes into the Rebuilding state If the missing primary disk drive then becomes available again it is rejected If after the write operation occur...

Page 217: ...on to the array occurs before the missing primary disk drive becomes available again Under this condition If a hot spare disk drive is available that hot spare disk drive automatically becomes the new primary disk drive and the array goes into the Rebuilding state If the missing primary disk drive then becomes available again it is rejected If after the write operation occurs no hot spare disk dri...

Page 218: ...ecause system 1 in not switched on The array remains in the Offline state on both systems until either of the following occurs v The primary disk drive becomes available v The Split Array Resolution flag is set to Secondary Secondary 1 Split Array Resolution Primary System 2 SSA Adapter Figure 31 Dual Host System with Only One System Switched On 198 User s Guide and Maintenance Information ...

Page 219: ...Resolution flag to Secondary on both halves of the array if you need access from system 2 This action ensures that write operations can be performed only on the secondary half of the array If data had been allowed to be written to both halves of the array the data would become unsynchronized If the two halves are later reconnected and the Split Array Resolution flag is set differently on the prima...

Page 220: ...rray enters the Good state for both systems Split Array Resolution Primary System 1 SSA Adapter System 2 SSA Adapter Secondary 1 Secondary 2 Primary 1 Primary 2 Split Array Resolution Primary 0011 0011 1111 0000 0011 0011 1111 1111 0000 1111 1010 1010 0000 1111 1010 1010 Figure 33 Reconnection of a Split Array 200 User s Guide and Maintenance Information ...

Page 221: ...lution flag is automatically set to Secondary and I O operations continue The array is in the Exposed or Degraded state When the primary disk drive is reconnected it is resynchronized from the secondary disk drive and the Split Array Resolution flag is automatically set to Primary Secondary 1 Split Array Resolution Primary System 1 SSA Adapter Primary 1 System 2 SSA Adapter Figure 34 RAID 1 Disk D...

Page 222: ...igure 36 shows system 2 disconnected from system 1 The array is in the Offline state If you set Split Array Resolution to Secondary the array goes into the Good state Secondary 1 Split Array Resolution Primary System 2 SSA Adapter Figure 35 RAID 1 Failure of a Host System and a Primary Disk Drive Split Array Resolution Primary System 2 SSA Adapter Secondary 1 Secondary 2 Figure 36 RAID 10 Failure ...

Page 223: ... unless you take specific action to make the array available This type of problem can be caused by v Incorrect reconfiguration of an array v Simultaneous failure of an SSA adapter and a disk drive Failure of an Adapter and a Disk Drive In Figure 37 an SSA adapter and a disk drive have failed When a new adapter is installed the array remains in the Offline state until the state of the Split Array R...

Page 224: ...he half of the array that is connected to adapter C and adapter D is in the Offline state System 3 and system 4 generate SRN 48755 You can solve this problem if you do one of the following v Return the primary half of the array to its original adapters v Move the secondary half of the array to the new adapters System 1 SSA Adapter A System 2 SSA Adapter B Secondary 1 Secondary 2 Primary 1 Primary ...

Page 225: ... to each half of the array v Both adapters can be detected on the SSA loop but one half of the RAID array cannot be detected and the following sequence of events occurs 1 A write operation is performed 2 The half of the array that could originally be detected can no longer be detected 3 The half of the array that could not originally be detected can now be detected and data is written to it 4 The ...

Page 226: ...ions can set this condition Separate write operations can be performed to each half of the array If these write operations are performed however the two halves of the array must not be reconnected Split Array Resolution Primary System 1 SSA Adapter System 2 SSA Adapter Secondary 1 Secondary 2 Primary 1 Primary 2 Split Array Resolution Primary Figure 39 Forcing Access on a RAID 10 Array 206 User s ...

Page 227: ... Under these conditions the array is in the Offline state and both systems generate SRN 48760 Split Array Resolution Primary System 1 SSA Adapter System 2 SSA Adapter Secondary 1 Secondary 2 Primary 1 Primary 2 Split Array Resolution Primary 0011 1110 1010 0000 1111 0000 0000 0001 1110 0001 1111 0100 0001 0101 0101 1110 Figure 40 Reconnecting an Unsynchronized Array Chapter 8 Split Site Management...

Page 228: ...208 User s Guide and Maintenance Information ...

Page 229: ...oup with a preassigned spare disk drive This process is called hot sparing v It synchronizes the new disk drive with the remaining disk drives in the volume group v It notifies you when it has logically exchanged a failed disk drive and has synchronized the replacement disk drive with the other disk drives in the volume group When a failed disk drive has been physically exchanged and the data has ...

Page 230: ...210 User s Guide and Maintenance Information ...

Page 231: ... logged This error recommends that the battery be exchanged for a new one At this time the fast write cache continues to work normally If the battery is not exchanged inside approximately three months from the time of the error the fast write cache is disabled and a new error is logged This error indicates that the fast write cache is no longer active Configuring the Fast Write Cache Feature This ...

Page 232: ...s use the smitty command The menus will then appear as shown in this book 2 If you use fast path commands you might need to go through intermediate steps that are not shown in this book Also some menus might be displayed slightly differently from those shown in this book 212 User s Guide and Maintenance Information ...

Page 233: ... Defined SSA Logical Disk Generate an Error Report Trace an SSA Logical Disk Show Logical to Physical SSA Disk Relationship List Adapters Connected to an SSA Logical Disk List SSA Logical Disks Connected to an SSA Adapter Identify an SSA Logical Disk Cancel all SSA Disk Identifications Enable Disable Fast Write for Multiple Devices F1 Help F2 Refresh F3 Cancel F8 Image F9 Shell F10 Exit Enter Do I...

Page 234: ...TIFIER 00406fdac2fb8203000000 ASSIGN physical volume identifier no RESERVE disk on open yes Queue depth 5 Maximum Coalesce 0x20000 Enable Fast Write yes Bypass Cache In 1 Way Fast Write Network no BOTTOM F1 Help F2 Refresh F3 Cancel F4 List F5 Reset F6 Command F7 Edit F8 Image F9 Shell F10 Exit Enter Do 2 If you want to enable the fast write function for a particular disk drive set the Enable Fast...

Page 235: ...ltiple Devices from the SSA Logical Disks menu b From the menu displayed select all the logical disk drives for which you are enabling or disabling the fast write function 2 The Enable Disable Fast Write for Multiple Devices menu appears Enable Disable Fast Write for Multiple Devices Type or select values in entry fields Press Enter AFTER making all desired changes Entry Fields List of Devices hdi...

Page 236: ...n set the Enable Fast Write option to no and the Force Delete option to yes The Force Delete screen is displayed Enable Disable Fast Write for Multiple Devices Force Delete Setting Force Delete to yes will allow the system to disable Fast Write for this SSA Logical Disk even if this involves discarding data in an inaccessible Fast Write Cache card The data in the Fast Write Cache card is the most ...

Page 237: ...Enter AFTER making all desired changes MORE 6 Entry Fields Location Label Parent ssar Size in Megabytes 4512 adapter_a ssa0 adapter_b ssa1 primary_adapter adapter_a Connection address 0004AC506C3600E Physical volume IDENTIFIER 00406fdac2fb8203000000 ASSIGN physical volume identifier no RESERVE disk on open yes Queue depth 5 Maximum Coalesce 0x20000 Enable Fast Write yes Bypass Cache In 1 Way Fast ...

Page 238: ...ist the devices that are affected by this failure The ssaraid command is in usr sbin v To list all devices that are affected by this cache failure type ssaraid l ssaX Iz a state cache_data_error where X is the number of the adapter that has reported the failure in the error log for example ssa3 The output from the command produces one line of information for each device as follows 2327340C228635K ...

Page 239: ... attempt to recover the data on the device Attention Ensure that the disk is not returned with its current use defined as System Disk until you are sure that the file system is safe v To reattach the disk and create a logical disk type ssaraid l ssaX H n Y a use system k Z d where X is the adapter number Y is the 15 digit device serial number from the list function that you ran earlier and Z is th...

Page 240: ... is described for SRN 42521 You must recover all the devices that are listed SRN 42525 If a Fast Write Cache Option Card fails or is removed from the adapter the affected devices are all those that contain unsynchronized data when the cache card fails or is removed To list these devices type ssaraid l ssaX Iz a state wrong_cache where X is the adapter number Use the recovery procedure that is desc...

Page 241: ...ice then sends the data to the system error logger SSA errors are logged asynchronously that is independently of any system I O activity For example if an SSA cable is unexpectedly disconnected an Open Serial Link error is logged immediately The SSA subsystem does not wait for a read or write command before it logs the error Sometimes on the SSA network the SSA adapter and SSA disk drives detect e...

Page 242: ...detected and the array is not fully operational Usually the data on the array is safe but ensure that you follow the service procedures exactly so that you do not lose any data SSA_CACHE_ERROR BC31DEA7 These errors indicate that the fast write cache has detected a problem Usually the problem has been caused by user or service actions such as moving a Fast Write Cache Option card from one adapter t...

Page 243: ... The disk drive has performed an internal error recovery operation No action is needed SSA_DISK_ERR3 8BDD5B42 The disk drive has performed internal media maintenance No action is needed SSA_DISK_ERR4 F7863CFE One of the following has occurred v The disk drive has had an unrecovered hardware error v The disk drive has had a hardware error that is now recovered but the disk drive is reporting that i...

Page 244: ...anently on when the device can communicate with the two SSA devices that are logically next to it on the SSA loop The light flashes if the device can communicate with only one of those two devices The light is off if the device cannot communicate with either of the two SSA devices Usually an SSA device is present at each side of the point where the SSA loop is broken Each of those devices has its ...

Page 245: ... Date Time Tue 23 Sep 03 00 00 Sequence Number 640 Machine Id 00400076C400 Node Id identity Class H Type PERM Resource Name ssa0 Resource Class adapter Resource Type ssa Location 04 07 The Type field can have the following flags PEND PERF PERM TEMP UNKN and INFO These flags are described in the using system documentation The PERM flag however is also described here because the SSA definition of th...

Page 246: ...ytes of debug data See Error Log Analysis on page 229 to find out how this data is used run_ssa_healthcheck cron The run_ssa_healthcheck program checks for SSA subsystem problems that do not cause I O errors but cause some loss or redundancy or functionality It reports such errors each hour until the problem is solved During SSA device driver installation the following entry is added to the cron t...

Page 247: ...ll If the program detects a problem it sends an error code to the system error log You can also use the ssa_speed x command to check whether any high speed nodes are running at low speed see ssa_speed Command on page 369 Duplicate Node Test The node_number attribute of the ssar can be set to enable SSA disk fencing or SSA target mode operations It is important however that duplicate node numbers d...

Page 248: ...SSA_CACHE_ERROR SSA_HDW_RECOVERED SSA_DEGRADED_ERROR SSA_LINK_ERROR SSA_DETECTED_ERROR SSA_LINK_OPEN SSA_DEVICE_ERROR SSA_LOGGING_ERROR SSA_DISK_ERR1 SSA_REMOTE_ERROR SSA_DISK_ERR4 SSA_SETUP_ERROR SSA_ENCL_ERR1 SSA_SOFTWARE_ERROR If one of these error types is permanent on a particular device it is reported each time that the health check is run The SSA adapter sends the resulting error log entrie...

Page 249: ...utomatic error log analysis 1 Sends an operator message OPMSG to the error log 2 Displays an error message on dev console 3 Sends a mail message to ssa_adm The name ssa_adm is an alias alternative address that is set up in etc aliases By default ssa_adm is set to root You can however change this alias to any valid mail address for your using system See your using system documentation for informati...

Page 250: ..._ssa_ela cron on page 232 v You can use the diag command to run error log analysis On the command line enter diag ecd device Error log analysis runs for the selected device If the analysis determines that service action is needed a message is displayed This message indicates that a problem was detected and requests that diagnostics be run to that device v You can run error log analysis to all SSA ...

Page 251: ...er of the data is used as an error log analysis threshold value If the number of times that a particular error has been logged during the previous 24 hours is greater than the threshold value for that error an SRN is generated This SRN is generated from the next 5 characters of the detail data Examples v The following is logged for ssa0 0400 0000 0000 00 Error log analysis produces SRN 40000 v The...

Page 252: ...ded to the cron table 01 5 usr lpp diagnostics bin run_ssa_ela 1 dev null 2 dev null This cron entry instructs the run_ssa_ela shell script to run at 05 01 each day for all SSA devices that are configured in the using system The shell script analyzes the error log If it finds any problems the script warns the user in the following ways It sends v A message to dev console This message is displayed ...

Page 253: ... of 24 hour periods Set timeperiod to include at least the 24 hours that preceded the error For example if at 09 00 on Monday you find that the error log analysis has reported an error on pdisk3 at 05 01 on Sunday type ssa_ela l pdisk3 h 3 where 3 is the number of 24 hour periods An SRN for the error is generated Note The error occurred on Sunday When running the error log analysis you need to inc...

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Page 255: ... used to exchange an existing member of a RAID array object List all candidate objects that can be used to create new RAID array objects v Give information about an object such as size and current usage Give information in colon separated format Give information in a summary format Give information for a specified device its members its parents its exchange candidates or its object candidates Give...

Page 256: ...cify RAID object names arrays or member disk drives as either the 15 character connection location or as the device name The preferred name is the 15 character connection location This name is the same as the SSA serial number for the device 2 You can specify Boolean attribute values as any of the following 0 1 f t false true n y no yes off on The attributes must be in lowercase 236 User s Guide a...

Page 257: ...e ssaraid Y c a o l RaidManager Legend RaidManager The name of the SSA adapter that has RAID array support Name The name of the specific device upon which the operation is to be performed See Notes about the ssaraid Command on page 236 Object Type The type of device upon which the operation is to be performed See Object Types on page 238 Attribute The name of the attribute Value The value of the a...

Page 258: ...ice name to use l The name of the SSA RAID manager to use m List the member objects for the named object n The name of an object for example a RAID array or member disk drive o Information is presented in colon separated format p List the parent objects for the named object r The name of the reference object for RAID Copy arrays s The disk drives that are to become members of the array t The type ...

Page 259: ...the member disk of the new array d specifies that a system disk is to be attached to the new array Example 2 To Create a RAID 1 Array This example shows how to use two SSA physical disks to create a RAID 1 array The attributes of the disks are all set to their default values Type the command ssaraid C l ssa0 t raid_1 s pdisk0 pdisk1 d where C specifies that this operation is a create operation l s...

Page 260: ...A physical disks to create a RAID 10 array The attributes of the disks are all set to their default values Type the command ssaraid C l ssa0 t raid_10 s pdisk0 pdisk1 pdisk3 pdisk2 d where C specifies that this operation is a create operation l ssa0 specifies that RAID Manager ssa0 is to be used t raid_10 specifies that a RAID 10 array object is to be created s pdisk specifies the free pdisk that ...

Page 261: ...er disk drives and hot spare disk drives Note Not all RAID managers provide support for the hot spare pool function Example 6 To List All Defined SSA Objects This example shows how to list all the defined SSA objects that are at present connected in summary format to a particular RAID manager Type the command ssaraid I z l ssa0 where I specifies that this operation is a list operation z specifies ...

Page 262: ...rray This example shows how to exchange a member disk drive of an existing array with a free pdisk for example to exchange pdisk0 with pdisk3 Type the command ssaraid A l ssa0 i exchange n hdisk5 a old_member pdisk0 new_member pdisk3 where A specifies that this operation is an exchange operation n hdisk5 specifies that the array about to be changed a old_member specifies the name of the existing m...

Page 263: ...r to that shown here pdisk0 0004AC506C4000D system n a 4 5GB Physical disk pdisk1 0004AC506D6D00D member n a 4 5GB Physical disk pdisk2 0004AC50A44200D member n a 2 3GB Physical disk pdisk3 0004AC515EA400D member n a 4 5GB Physical disk hdisk5 900335FE80C84CK rebuilding 9 0GB RAID 5 array Example 10 To Delete an Array This example shows how to delete an array Type the command ssaraid D l ssa0 n hd...

Page 264: ...sk drives of the array This action greatly improves the performance of write operations to the array although the blocks are not written sequentially to the member disk drives With the attribute set to false The blocks of data are written sequentially to the member disk drives of the array This action can have a negative effect on the performance of write operations to the array The sequence in wh...

Page 265: ... and a write operation to that array is attempted the array enters the Degraded state You can prevent the array from entering the Degraded state if you enable the spare attribute of the array and provide a suitable hot spare disk drive to the RAID manager that is controlling the array When the spare attribute is enabled and a write operation is attempted to an array that is in the Exposed state th...

Page 266: ...array enters the Exposed state and hot spare disk drives are enabled a hot spare disk drive is added to the array when the first write operation to that array is attempted If no suitable hot spare disk drive is available the array operates in read only mode spare_preferred default true This attribute is used with the spare attribute With the attribute set to true a hot spare disk drive is selected...

Page 267: ... is configured to provide protection against the loss of a physical domain copy_rate default 50 This attribute controls the speed of the copy operation when an I O operation is in progress It can be set to any integer value 1 through 100 Higher values increase the speed of the copy operation but decrease the speed of the I O operation copy_verify_writes default no With the attribute set to yes all...

Page 268: ... attribute with the a option when you are using the ssaraid command with the C option to create a RAID 10 array strip_size default 32 This attribute is used only when the array is created The strip size is the maximum amount of contiguous data that is mapped to one member disk drive Valid values are 32 16 KB or 32 x 512 byte blocks 64 32 KB or 64 x 512 byte blocks and 128 64 KB or 128 x 512 byte b...

Page 269: ...ed to the specific hot spare pool Change Attribute for Array Member Disk Drives Only You can specify the following attribute with the a option only when you are using the ssaraid command with the H option to change an array member disk drive spare_pool default pool_A0 or pool_B0 as determined by the network ID If you set this attribute the array member disk drive is assigned to the specific hot sp...

Page 270: ...drive the following values for the use attribute can also be displayed member The disk drive is a member of an array rejected The disk drive was a member of an array It was rejected from the array because it reported a problem You cannot change the use of member disk drives You must first remove the disk drives from their array either by deleting the array or by exchanging them out of the array wi...

Page 271: ...om the array Use the old_member attribute and the new_member attribute together if you want to exchange the disk drives in one action and the subsystem has a spare slot available for the new disk drive If no spare slot is available use the following method to exchange the disk drives 1 Logically remove the failing disk drive For this action use the ssaraid command with only the old_member attribut...

Page 272: ...is copying is assigned secondary Each coupled disk drive is assigned to the hot spare pool to which the secondary disk drive that it is copying is assigned force yes no If the specified RAID Copy array contains data that has been copied from another RAID array use the force yes flag to force this RAID Copy to be coupled with the array Note that the data that is stored on the RAID Copy array is los...

Page 273: ...tem call failed 9 Internal logic error 10 Method not found not executable or not correct 11 Problem communicating with back end method 12 Problem with environment variable message catalog and so on 100 Problem with self defining structure for RDVs 101 The argument in the command line is not valid and given to back end 102 Problem with FC_CandidateList transaction 103 Problem with FC_ResrcList tran...

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Page 275: ... 291 Responsibilities of the SSA Adapter Device Driver The SSA adapter device driver provides a consistent interface to all SSA head device drivers of which the SSA disk device driver is an example The SSA adapter device driver sends commands for SSA devices to the adapter that is related to those devices When the SSA adapter device driver detects that the commands have completed it informs the or...

Page 276: ... fp_close kernel service to close the adapter Note When fp_close is called SSA_Ipn_Directive cannot be called Trace Formatting The SSA adapter device driver and the SSA disk device driver can both make entries in the kernel trace buffer The hook ID for the SSA adapter device driver is 45A The hook ID for the SSA disk device driver is 45B For information on how to use the kernel trace feature refer...

Page 277: ...he lsattr command ucode Holds the file name of the microcode package file that supplies the adapter microcode that is present in an SSA adapter bus_io_addr Holds the value of the bus I O base address of the adapter registers that the SSA adapter device driver for this adapter will use bus_mem_start Holds the value of the bus memory start address that the SSA adapter device driver for this adapter ...

Page 278: ...es Specifies the number of 4 kilobyte pages that the device driver has kept for the management of scatter gather lists If many large transfer operations are to be performed think about increasing the value of this attribute if the I O does not reach the expected rate dma_mem Specifies the size of the DMA memory On systems that are using AIX version 4 3 or above the memory should be big enough to h...

Page 279: ...cessed calls to the SSA adapter device driver DUMPWRITE option should use the arg parameter as a pointer to the SSA_Ioreq_t structure which is defined in usr include sys ssa h Using this interface commands for which the adapter provides support can be run on a previously started opened target device The SSA adapter device driver ignores the uiop parameter Note Only the SsaMCB MCB_Result field of t...

Page 280: ...Files dev ssa0 dev ssa1 dev ssan Provide an interface to allow SSA head device drivers to access SSA devices or adapters 260 User s Guide and Maintenance Information ...

Page 281: ...nfo This area is in the arg parameter to the IOCINFO operation The device type field for this component is DD_BUS the subtype is DS_SDA The IOCINFO operation is defined for all device drivers that use the ioctl subroutine as follows The operation returns a devinfo structure The caller supplies the address of this structure in the argument to the IOCINFO operation The device type in this structure ...

Page 282: ...cture DestinationNode Contains the target node for the transaction DestinationService Contains the target service on that node MajorNumber Major number of the transaction MinorNumber Minor number of the transaction DirectiveStatusByte Contains the directive status byte for the transaction This contains a value that is defined in the usr include ipn ipndef h file A non zero value indicates an error...

Page 283: ...em crashes system corruption or undetected data loss Return Values When completed successfully this operation returns a value of 0 Otherwise a value of 1 is returned and the errno global variable is set to one of the following values EIO Indicates an unrecoverable I O error ENXIO Indicates an unknown device EINVAL Indicates an unknown command Indicates a bad buffer type EACCESS Indicates user does...

Page 284: ...ce The SSA_GetEntryPointParms_t structure is defined in the usr include sys ssa h file On completion of the operation the fields in the SSA_GetEntryPointParms_t structure are modified as follows EntryPoint Address of the direct call entry point for the SSA adapter device driver which is used to submit operations from a head device driver InterruptPriority The off level interrupt priority at which ...

Page 285: ... h file The fields of the SSA_Ioreq_t structure are used as follows SsaDPB An array of size SSA_DPB_SIZE which is used by the SSA adapter device driver and should be initialized to all NULLs SsaNotify The address of the function in the SSA head device driver that the SSA adapter device driver calls when the directive has completed u0 The transaction to be executed Valid transactions are described ...

Page 286: ...em or for each array By default all disk drives are configured as system disk drives The array management software deletes hdisks to create arrays SSA physical disks have the following properties They v Are configured as pdisk0 pdisk1 pdiskn v Have errors logged against them in the system error log v Provide support for a character special file dev pdisk0 dev pdisk1 dev pdiskn v Provide support fo...

Page 287: ...have occurred when the device driver successfully accesses the disk drive through the alternative adapter When takeover has occurred the device driver continues to use the alternative adapter to access the disk drive until either the system is rebooted or takeover occurs back to the original adapter Each time the SSA disks are configured the SSA disk device driver is informed which path or paths a...

Page 288: ...SSA disk drives are represented as SSA logical disks hdisk0 hdisk1 hdiskn and SSA physical disks pdisk0 pdisk1 pdiskn The properties of each are described in the SSA Subsystem Overview Normally the system boot process automatically configures all the disk drives that are connected to the using system You do not need to take any action to configure them Because SSA devices might be added to the SSA...

Page 289: ... that is shown on the label that is on the side of the disk drive You can recognize the UID by its three character suffix 00D v Run the ssacand command and specify the adapter to which the physical disk is connected For example ssacand a ssa0 P Using mkdev to Configure a Logical Disk To use mkdev to configure an SSA logical disk specify the following information Parent ssar Class disk Subclass ssa...

Page 290: ...apter to which the logical disk is connected For example ssacand a ssa0 L Device Attributes SSA logical disks and SSA physical disks and the ssar router have several attributes You can use the lsattr command to display these attributes Attributes of the SSA Router ssar node_number This attribute must be set on systems that are using the SSA Fencing facility or the SSA Disk Concurrent Mode of Opera...

Page 291: ...The serial numbers of the disk drives are the only method of identification The serial number of a particular disk drive is written in the connwhere field of the CuDv entry for that disk drive This connwhere_shad attribute which shadows the connwhere value allows you to display the connwhere value for an SSA device for a pdisk or hdisk location Describes in text the descriptions of the disk drives...

Page 292: ... queue_depth read commands and up to write_queue_mod write commands to the logical disk This facility is provided because in some environments it might be beneficial to hold back write commands in the device driver so that they can be coalesced into larger operations that can be handled as full stride writes by the RAID software in the adapter This facility is not likely to be useful unless a larg...

Page 293: ...initiator has the device reserved the reservation is broken Otherwise the open operation runs normally This flag has support only for SSA logical disks You cannot specify this flag and the SSADISK_FENCEMODE flag together SSADISK_RETAIN_RESERVATION Retains the reservation of the device after a close operation by not issuing the release This flag prevents other initiators from using the device unles...

Page 294: ...ed in this mode is rejected with an error This flag has support only for SSA logical disk drives You cannot specify this flag and the SSADISK_NO_RESERVE flag SSADISK_FORCED_OPEN flag or SSADISK_RETAIN_RESERVATION flag together You can find more specific information about the open operations in SSA Options to the openx Subroutine in the Kernel Extensions and Device Support Programming Concepts manu...

Page 295: ...onditions has occurred v The target device cannot be located or is not responding v The target device has indicated an unrecovered hardware error ESOFT The target device has reported a recoverable media error EMEDIA The target device has found an unrecovered media error ENODEV One of the following conditions has occurred v An attempt was made to access a device that is not defined v An attempt was...

Page 296: ...ver uses include the following listed by type of device v SSA logical disk drives dev hdisk0 dev hdisk1 dev hdiskn Provide an interface that allows SSA device drivers to have block I O access to logical SSA disk drives dev rhdisk0 dev rhdisk1 dev rhdiskn Provide an interface that allows SSA device drivers to have character access raw I O access and control functions to logical SSA disk drives v SS...

Page 297: ...e arg parameter to the IOCINFO operation The device type field for this component is DD_SCDISK the subtype is DS_PV The information that is returned includes the block size in bytes and the total number of blocks on the disk drive Files dev pdisk0 dev pdisk1 dev pdiskn Provide an interface that allows SSA device drivers to have access to SSA physical disk drives dev pdisk0 dev pdisk1 dev pdiskn Pr...

Page 298: ...SAL_Unlock FN_ISAL_Test FN_ISAL_SCSI FN_ISAL_Download FN_ISAL_Fence Notes 1 Some of these commands are not valid for SSA hdisks but are valid for SSA pdisks others are valid for SSA hdisks but are not valid for SSA pdisks The adapter card not the device driver checks whether the commands are valid If the caller attempts to send a command to a device for which that command is not valid the adapter ...

Page 299: ...the start of the description of this operation Note Structures that are provided in the usr include ipn ipnsal h file can be used to format the contents of the parameter buffer for the various commands The device driver always overwrites with the correct handle the handle that is located in the first four bytes of the parameter buffer Return Values If the command was successfully sent to the adapt...

Page 300: ...ovide an interface to allow SSA device drivers to access SSA physical disk drives dev hdisk0 dev hdisk1 dev hdiskn Provide an interface to allow SSA device drivers to access SSA logical disk drives 280 User s Guide and Maintenance Information ...

Page 301: ...SALMgrVPDInquiry FN_ISALMgr_Characteristics FN_ISALMgr_Statistics FN_ISALMgr_FlashIndicator The arg parameter for the SSADISK_ISALMgr_CMD ioctl is the address of an ssadisk_ioctl_parms structure This structure is defined in the usr include sys ssadisk h file The SSADISK_ISALMgr_CMD ioctl uses the following fields of the ssadisk_ioctl_parms structure dsb Contains the directive status byte that is r...

Page 302: ...d and the errno global variable set to one of the following values EIO Indicates an unrecoverable I O error EINVAL Indicates that the caller has specified an ISAL manager command that is not in the list of supported ISAL manager commands The commands are listed at the start of the description of this operation EPERM Indicates that caller did not have an effective user ID EUID of 0 ENOMEM Indicates...

Page 303: ... an error result Contains the IPN result word that is returned by IPN for the command The word contains values from the usr include ipn ipntra h file A non zero value indicates an error u0 scsi data_descriptor Set by the caller to describe the buffer for any data that is transferred by the SCSI command If no data is transferred the length of the buffer should be set to 0 u0 scsi direction Set by t...

Page 304: ...ze the SCSI command as valid EINVAL Either the u0 scsi cdb_length field in the ssadisk_ioctl_parms structure was set to a length that is not valid or the u0 scsi direction field in the ssadisk_ioctl_parms structure was set to a value that is not valid EPERM The caller did not have an effective user ID EUID of 0 ENOMEM The device driver was unable to allocate or pin enough memory to complete the op...

Page 305: ...hat is in the caller memory On return from the ioctl this array is filled with the names of the hdisks u0 list_pdisks name_array_elements Set by the caller to indicate the number of elements that are in the array at which the u0 list_pdisks name_array parameter is pointing u0 list_pdisks name_count On return from the ioctl this field indicates the number of names that are in the name array at whic...

Page 306: ... EIO An unrecoverable I O error has occurred ENOMEN The device driver was unable to allocate or pin enough memory to complete the operation Files dev pdisk0 dev pdisk1 dev pdiskn Provide an interface to allow SSA device drivers to access SSA physical disks dev hdisk0 dev hdisk1 dev hdiskn Provide an interface to allow SSA device drivers to access SSA logical disks 286 User s Guide and Maintenance ...

Page 307: ... the concurrent mode interface works set the node_number attribute of the ssar router see Reserving Disk Drives on page 27 to a different non zero value for each using system that is sharing a disk drive Device Driver Entry Point The SSA disk device driver concurrent mode entry point sends commands from the top kernel extension that is related to a specified SSA disk drive The top kernel extension...

Page 308: ...sion Top Kernel Extension Entry Point The top kernel extension must have a concurrent mode command interrupt handler entry point which is called directly from the interrupt handler of the SSA disk device This entry point function can take four arguments v conc_cmd pointer v cmd_op field v message_code field v devno field The conc_cmd pointer points at a conc_cmd structure These arguments must be o...

Page 309: ...op kernel extension is non null The cmd_op message_code and devno fields are zero DD_CONC_RECV_REFRESH A message with message_code was received for the SSA disk drive that is specified by the devno argument The conc_cmd argument is null for this operation DD_CONC_RESET The SSA disk drive that is specified by the devno argument was reset and all pending messages or commands have been flushed The ar...

Page 310: ... to the disk drive Therefore if a disk drive is moved from a machine that has been using fencing to a machine that has not been using fencing the new machine can communicate with the disk drive If a using system attempts to use the open subroutine to open a disk drive to which it is not allowed access the return code is 1 and the global variable errno is set to the value ENOCONNECT Similarly if an...

Page 311: ...ven minor device number and is write only dev tmssaXX tm The target mode device which has an odd minor device number and is read only The device is tmssaXX where XX is the node number of the using system with which these files communicate You are not aware of which path connects the two nodes The path can change if for example SSA loops are changed nodes are switched off or any other physical chan...

Page 312: ...l a write operation is the write time out period You can adjust the write time out period and the retry time out period see TMCHGIMPARM Change Parameters tmssa Device Driver ioctl Operation on page 308 You can use the select and poll routines to check for read and write capability and can also be notified of the possibility of a read or write operation The amount of data that can be sent by one wr...

Page 313: ... target mode device however must be equal to or greater than the size of the initiator mode device buffer size The SSA interface for target mode transfers has been tuned for 512 byte transfers Each write operation can send as much data as is required unless that write operation is nonblocking In a nonblocking write operation the data that is being written must be completely transferred to the devi...

Page 314: ...write operation transfers the data into the device buffers When a buffer is full the SSA adapter starts to transfer the data to the remote using system At the same time the user s application program continues to fill the device buffer with the remaining data that is being transferred If the amount of data that is being written is larger than the available buffer space the application program wait...

Page 315: ... fp_rwuio service call to start sending data The SSA target mode device driver then builds a send command to describe the transfer and the data is sent to the device The data can be sent as a blocking write operation or as a nonblocking write operation When the write entry point returns the calling program can access the transmit buffer When the caller opens the target mode special file a logical ...

Page 316: ...nt must be called only for the initiator mode device number The device driver configuration routine automatically creates the configuration data for the target mode device minor number This data is related to the initiator mode data Device Dependent Subroutines The target mode device driver provides support for the following subroutines v open v close v read v write v ioctl v select open Subroutin...

Page 317: ...ytes that were read The caller should verify the number of bytes that were read File offsets are not applicable and are ignored for target mode read operations The adapter write operations provide the boundary that determines how read requests are controlled If more data is received than is requested in the current read operation the requested data is passed to the caller and the remaining data is...

Page 318: ...lying the value of the RecvBufferSize attribute by the value of the RecvBuffers attribute These values are in the configuration database While the application program runs read subroutines the queued data is copied to the application data buffer and the read ahead buffer space is again made available for received data If an error occurs while he data is being copied to the caller data buffer the r...

Page 319: ...erated The target mode device driver receives that signal and ends the current write operation The write operation that is in progress fails and the errno global variable is set to EINTR The write operation returns the number of bytes that were already sent before the signal was generated The calling program can then continue by issuing another write operation or an ioctl operation or it can close...

Page 320: ...se the TMIOSTAT operation The driver keeps the status of the last write operation which is then reported by the TMIOSTAT operation Possible return values for the errno global variable include EFAULT The write operation was unsuccessful because of a kernel service error This value is applicable only during data gathering EINTR Interrupted by signal EINVAL Attempted to execute a write operation for ...

Page 321: ...lect Entry Point The select entry point allows the caller to know when a specified event has occurred on one or more target mode devices The event input parameter allows the caller to specify about which of one or more conditions it wants to be notified by a bitwise OR of one or more flags The target mode device driver provides support for the following select events POLLIN Check whether received ...

Page 322: ...parameter points to the result of the conditional checks The device driver can return a bitwise OR of the following flags POLLOUT If the initiator device is opened with the O_NDELAY flag some buffer space is not being used now Otherwise this event is always set for the initiator mode device POLLPRI An error occurred with the latest write operation Asynchronous notification of the POLLOUT event occ...

Page 323: ...s Only errors that the target mode device driver can itself recover through retry operations can be determined to be either temporary or permanent The error is ignored if it succeeds during retry a recovered error The return code to the caller indicates success if a recovered error occurs or failure if an unrecovered error occurs The caller can retry the command or operation but success is probabl...

Page 324: ...or mode special file a logical path is set up This path allows data to be transmitted The user mode caller issues a write writev writex or writevx system call to start data transmission The kernel mode user issues an fp_write or fp_rwuio service call to start data transmission The SSA target mode device driver then builds a send command to describe the transfer and the data is sent to the device T...

Page 325: ... The SCSI target mode union is used for this as follows Initiator Device buf_size Size of transmit buffer num_bufs Number of transmit buffers max_transfer Unused Set to zero adap_devno Major or Minor devno of SSA adapter to be used for the next transmit operation Use TM_GetDevinfoNodeNum to read the node number to which the data is sent Target Device buf_size Size of receive buffer num_bufs Number...

Page 326: ...nfoNodeNum to read the node number from which the data is received The remainder of the structure is filled as follows devtype DD_TMSCSI flags Set to zero devsubtype DS_TM 306 User s Guide and Maintenance Information ...

Page 327: ...cular write operation The tm_get_stat structure in the usr include sys tmscsi h file is used to indicate the status as follows status_validity Bit 0 set scsi_status valid scsi_status SC_BUSY_STATUS Write operation in progress SC_GOOD_STATUS Write operation completed successfully SC_CHECK_CONDITION Write operation failed general_card_status Unused Set to zero b_error errno for a failed write operat...

Page 328: ... changing the caller sets the appropriate bit in the chg_option field The caller can change either the retry parameter or the time out parameter or it can change both parameters To change the delay between send command retries the caller sets the TM_CHG_RETRY_DELAY flag in the chg_option field and puts the required delay value in seconds into the new_delay field of the structure With this command ...

Page 329: ... the caller specifies no time out for the send command allowing the command to take an indefinite amount of time If the calling program wants to end a write operation it generates a signal This option is allowed only for blocking type write operations Chapter 13 Using the Programming Interface 309 ...

Page 330: ...310 User s Guide and Maintenance Information ...

Page 331: ...Part 2 Maintenance Information 311 ...

Page 332: ...312 User s Guide and Maintenance Information ...

Page 333: ...r the devices See also Chapter 2 Introducing SSA Loops on page 7 for general information about SSA loops and links Note If for any reason an adapter is exchanged for a replacement adapter all associated arrays that were not synchronized when the adapter failed are rebuilt Cron Table Entries During the installation of the SSA software the following four entries are made in the system cron table 01 ...

Page 334: ...he black cables for 40 MB per second cables blue SSA cables If you are using 20 MB per second SSA cables to connect 40 MB per second SSA nodes therefore delete the run_ssa_link_speed cron entry Microcode Maintenance This section describes how to v Check the ID and the level of the microcode package v Maintain the adapter microcode v Maintain the disk drive microcode Checking the ID and Level of th...

Page 335: ... with the installation media 2 Run the cfgmgr command if you have not already done so to download the new microcode into the SSA adapter 3 If the SSA loops that are connected to this adapter contain two or more SSA adapters and those adapters are installed in two or more using systems load the adapter microcode then run the cfgmgr command on each using system If the level of the microcode that is ...

Page 336: ...ant code ROS level and ID The version of read only storage ROS code that is loaded on the adapter Loadable microcode level The version of loadable code that is needed for the satisfactory operation of this card Device driver level The minimum level of device driver that is needed for this level of card Description of function A message that can be displayed Device specific Z0 The size in megabytes...

Page 337: ...es cause the adapter to become unavailable to the using system Other POST failures allow the adapter to be available although some function might not be enabled The particular tests that are run are related to the type of SSA adapter that is being used If a POST fails and prevents the adapter from becoming available exchange the adapter card for a new one If a POST fails but does not prevent the a...

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Page 339: ... of all hdisks that are configured as RAID arrays If an hdisk that is a RAID 1 RAID 5 or RAID 10 array is using the pdisk you can remove the disk drive from the array Go to step 7 on page 322 If an hdisk that is a RAID 0 array is using the pdisk a Ask the customer to make a backup of the data if possible from the array and to make the disk free b Ensure that you delete the array before you exchang...

Page 340: ...D Arrays Recorded in an SSA RAID Manager List Status of Hot Spare Pools List Status of Hot Spare Protection for an SSA RAID Array List Components in a Hot Spare Pool SSA RAID Array Move cursor to desired item and press Enter hdisk3 095231779F0737K good 3 4G RAID 0 array hdisk4 09523173A02137K good 3 4G RAID 0 array F1 Help F2 Refresh F3 Cancel F8 Image F10 Exit Enter Do Find n Find Next 3 Select t...

Page 341: ...r an SSA RAID Array List Components in a Hot Spare Pool ARE YOU SURE Continuing may delete information you may want to keep This is your last chance to stop before continuing Press Enter to continue Press Cancel to return to the application F1 Help F2 Refresh F3 Cancel F8 Image F10 Exit Enter Do Find n Find Next 5 Attention When an array is deleted all the data that is contained in that array is l...

Page 342: ... Change Member Disks in an SSA RAID Array Move cursor to desired item and press Enter Remove a Disk from an SSA RAID Array Add a Disk to an SSA RAID Array Swap Members of an SSA RAID Array SSA RAID Array Move cursor to desired item and press Enter hdisk3 095231779F0737K good 3 4G RAID 5 array hdisk4 09523173A02137K good 3 4G RAID 5 array F1 Help F2 Refresh F3 Cancel F8 Image F10 Exit Enter Do Find...

Page 343: ...a Device on page 409 12 Press Enter to remove the disk drive from the array 13 If the Check light of the disk drive that you are removing is off use the Set Service Mode service aid to put that disk drive into Service Mode see Set Service Mode Service Aid on page 378 If the Check light of the disk drive that you are removing is on you do not need to select Service Mode before you remove that disk ...

Page 344: ...ve the cfgmgr command on each using system to which that disk drive is connected The command configures the disk drive If you installed the disk drive while the using system was switched off switch on the using system when you are ready to do so When you switch on the using system the disk drive is automatically configured 19 Use the Display Download Microcode service aid to check whether the micr...

Page 345: ... is listed under SSA Physical Disks that are system disks 26 Select the pdisk from the list 27 Change the Current Use parameter to Hot Spare Disk or to Array Candidate Disk Note It is the user who should make the choice of Current Use parameter That choice should be v Hot Spare Disk if the use of hot spares is enabled for the RAID arrays on the subsystem v Array Candidate Disk if the use of hot sp...

Page 346: ...er Ftype where disknumber is the pdisk or hdisk number for example pdisk0 that you want to change The command returns the device Type for the disk 5 Make a note of this device type you will need it later in this procedure 6 Remove the existing pdisk or hdisk number from the configuration Give the command rmdev l disknumber d where disknumber is the pdisk or hdisk number for example pdisk0 that you...

Page 347: ...d of an Advanced SerialRAID Adapter on page 334 if you are installing a Fast Write Cache Option Card 4 If the network into which you are installing this adapter is a two way network and it contains RAID 1 or RAID 10 arrays with coupled disk drives see Chapter 7 Copying Data from Arrays and from Volume Groups on page 149 go to step 5 If the network into which you are installing this adapter is not ...

Page 348: ...SSA adapter that is on the partner system to ensure that no array problems exist b Wait until all coupled disk drives can be uncoupled before you connect the new adapter to the network 6 Install the adapter into the using system see the Installation and Service Guide for the using system 328 User s Guide and Maintenance Information ...

Page 349: ... Remove the adapter from the using system see the Installation and Service Guide for the using system 2 Refer to Figure 43 3 Holding your thumbs against the connector 3 open the clips 1 by pressing them in the directions shown by the arrows in the diagram This action pulls the SDRAM module 2 out of the connector 4 Remove the SDRAM module 1 1 2 3 3 Figure 43 Removing the SDRAM Module Chapter 15 Rem...

Page 350: ...to protect such parts v If you are exchanging a new SDRAM for a failed SDRAM ensure that new SDRAM is the same size as the old SDRAM Refer to the label on each SDRAM 1 Refer to Figure 44 2 Ensure that the clips 1 are fully open 3 Hold the SDRAM module so that its slots 2 align with the guides 3 of the connector 1 1 3 3 2 2 Figure 44 Checking the Clips Slots and Guides 330 User s Guide and Maintena...

Page 351: ...hown by the arrows in the diagram You hear a click when the clips are fully closed If you cannot close the clips the module is not fully home Press the module fully home then close the clips 8 Reinstall the adapter into the using system see the Installation and Service Guide for the using system 1 1 Figure 45 Installing the SDRAM Module Chapter 15 Removal and Replacement Procedures 331 ...

Page 352: ... Cache Option card might contain customer data 1 Remove the adapter from the using system see the Installation and Service Guide for the using system 2 Place the adapter card with its components downward onto a nonconducting surface 3 Refer to Figure 46 4 Remove the mounting screw 1 The screw fastens the Fast Write Cache Option card in position 1 Figure 46 Removing the Mounting Screw from the Fast...

Page 353: ...the adapter card so that its components are upward 7 Carefully unplug the Fast Write Cache Option card 2 from the connector 1 1 2 Figure 47 Removing the Fast Write Cache Option Card Chapter 15 Removal and Replacement Procedures 333 ...

Page 354: ...ing system if not already removed see the Installation and Service Guide for the using system 2 Place the adapter card with its components upward onto a nonconducting surface 3 Refer to Figure 48 4 Carefully plug the Fast Write Cache Option Card 2 into the connector 1 Ensure that you push the cache card fully home 5 Invert the adapter card so that its components are downward 1 2 Figure 48 Installi...

Page 355: ...te Option Card is not fully charged After the adapter is connected to the power initial battery charging completes in 5 to 60 minutes During this time the fast write disks can be enabled and used but the fast write function remains inactive To determine whether the fast write cache is active or inactive give the command ssa_fw_status a ssaX c 1 Figure 49 Installing the Mounting Screw of the Fast W...

Page 356: ...stem see the Installation and Service Guide for the using system 2 Remove the Fast Write Cache Option card see Removing the Fast Write Cache Option Card of an Advanced SerialRAID Adapter on page 332 3 Refer to Figure 50 4 Attention The battery falls when it is released from the Fast Write Cache Option card Hold the Fast Write Cache Option card approximately 10 mm 0 5 in above a work surface 5 Pres...

Page 357: ...o Figure 51 7 Invert the Fast Write Cache Option card 8 Carefully unplug the battery assembly from the connector 1 1 Figure 51 Disconnecting the Battery Assembly Chapter 15 Removal and Replacement Procedures 337 ...

Page 358: ...ve Use the tools and procedures defined by your organization to protect such parts v The Fast Write Cache Option card might contain customer data 1 Refer to Figure 52 2 Hold the Fast Write Cache Option card so that the battery assembly connector 1 is upward 3 Connect the battery assembly to the connector 1 1 Figure 52 Connecting the Battery Assembly 338 User s Guide and Maintenance Information ...

Page 359: ...e Option Card might be fully discharged If it is the diagnostics fail and generate SRN 42529 see Service Request Numbers SRNs on page 411 While the battery is discharged the adapter can be used the Fast Write Cache feature however remains disabled until the battery is charged The battery becomes fully charged approximately one hour after the adapter is connected to the power 9 You must now reset t...

Page 360: ...r card without SDRAM module and without Fast Write Cache Option card 09L2090 v 64 MB module 09L2104 v 128 MB module 08J0663 v Fast Write Cache Option Card 09L2105 v Fast write cache battery 09L5609 340 User s Guide and Maintenance Information ...

Page 361: ... to download a specified microcode file to a specified enclosure To enable the latest level of microcode to be downloaded to all enclosures either the microcode file must be located in the etc microcode directory or the microcode filename and path name must be specified with the f flag To enable the microcode to be downloaded to a specified enclosure the microcode file name and its full path name ...

Page 362: ...hex on enclosure0 give the command ssa_sesdld d enclosure0 f etc microcode coral1014 hex To install microcode file coral1014 hex on all available SES enclosures whose existing level of microcode is lower than coral1014 give the command ssa_sesdld f etc microcode coral1014 hex u To install microcode file coral1014 hex on enclosure0 only if the existing level of microcode on enclosure0 is lower than...

Page 363: ... ssaadap l PhysicalDiskName Description The output is the list of SSA adapters to which the logical or physical disk is connected If the list contains more than one adapter the first adapter in the list is the primary adapter Flags l DiskName Specifies the logical or physical disk Chapter 16 Using the SSA Command Line Utilities 343 ...

Page 364: ...er These connection locations are related to disk drives that although connected to the adapter are not yet configured as system disk drives Flags a AdapterName Specifies the adapter whose connection locations are to be listed P Produce a list of possible connection locations for physical disks L Produce a list of possible connection locations for logical disks 344 User s Guide and Maintenance Inf...

Page 365: ...sign the soft error blocks fails if the block has a hard media error or if the disk drive cannot perform automatic reassign operations the ssa_certify command returns 0 but prints to stdout the LBA of the failing block in decimal followed by the word Failed For example ssa_certify l pdisk4 436537676 Failed If the disk drive cannot perform automatic reassign operations 1 Stop all operations to the ...

Page 366: ...specified for this flag 64 kilobytes Maximum value that can be specified for this flag 10240 kilobytes Larger values for the MaxReadSize can cause other requests to be delayed if the ssa_certify command is run concurrently on an active using system b StartLBA Specifies the RAID 5 array LBA from where the certify operation should start If this flag is not set the certify operation starts from LBA 0...

Page 367: ... the physical disk and the A1 A2 B1 and B2 ports of the adapter respectively For example if hop count 1 is 0 no devices are between the physical disk and the A1 port of the adapter If hop count 4 is 5 five devices are between the physical disk and the B2 port of the adapter If the disk is not connected to a particular adapter port the hop count is replaced by a dash character Flags l PhysicalDiskN...

Page 368: ... used only with a disk drive It cannot be used with the a flag or with the u flag Disk drive status output is 0 Good the adapter has initialized the pdisk 1 Power the pdisk has detected a loss of redundant power or cooling Note If the pdisk is in a 7133 Model D40 or Model T40 this status indicates that the enclosure has detected a degraded environment Such an environment might be caused by a power...

Page 369: ...ives that are connected to an SSA adapter These names are related to devices that are in the customized device data base and have the SSA adapter as their adapter_a or adapter_b attribute Flags a AdapterName Specifies the adapter to which the disk drives are connected P Produce a list of physical disks L Produce a list of logical disks Chapter 16 Using the SSA Command Line Utilities 349 ...

Page 370: ...m Notes 1 The microcode files that this command can download have names of the pattern ssadisk ros XXXX where XXXX identifies the microcode level also known as the ROS id that the file contains Such microcode files are different from those with names of the pattern ssadisk XXXXXXX YY These files contain a different type of disk microcode and are automatically downloaded by the system configuration...

Page 371: ...re than one copy of ssadload to run at the same time Parallel download operations are therefore possible Attention When this flag is used a download operation to two disk drives that are in the same loop or array can occur if the using system contains two SSA adapters The user must ensure that such operations do not occur Examples v Using the f flag ssadload d pdisk0 f ssadisk ros 7899 With this f...

Page 372: ...ves that are connected to adapter ssa0 v Using the u a adapter and p flags ssadload u a ssa0 p ssadload u a ssa1 p With these flags the command causes the update mechanism to run in parallel and update concurrently the microcode on all the available disk drives that are connected to adapters ssa0 and ssa1 352 User s Guide and Maintenance Information ...

Page 373: ...fied pdisk The command returns the SRN for the most significant error The ssa_ela l hdisk command scans the error log and looks for errors that are logged against any hardware that provides support for the specified hdisk pdisks and adapters The command returns the SRN for the most significant error The ssa_ela l adapter command scans the error log and looks for errors that are logged against the ...

Page 374: ... sends an error message to stdout such as ssa0 SRN 42500 If no error occurs the command sends no message to stdout A non zero return code indicates an error The command sends an error message to stderr 354 User s Guide and Maintenance Information ...

Page 375: ...odify settings at the same time When the command displays enclosure settings it displays them in tables that the user can read easily If the s flag is specified however the command displays the settings in colon separated format as used by commands such as the SMIT commands Flags l name Specifies the name of an SSA SES enclosure or pdisk If a pdisk name is used that pdisk must be in an SSA SES enc...

Page 376: ...he power supply assemblies or of only the specified power supply assemblies Valid values for the PSU parameter are 1 2 3 and so on o Displays the status of the operator panel c Displays the status of the controller card e Displays trace information for service use only I ID U Modifies the enclosure ID The ID must be a four character alphanumeric string The optional U flag causes the object data ma...

Page 377: ...he threshold parameter are lowarn The low temperature warning threshold hiwarn The high temperature warning threshold The value parameter is a temperature in degrees C Examples v To display the status of all bypass cards on enclosure0 give the command ssaencl l enclosure0 b v To display the status and VPD of the controller card in enclosure0 give the command ssaencl l enclosure0 c v v To modify th...

Page 378: ...b command resets the battery age counter on the Fast Write Cache Option Card Use this option only when you have exchanged the Fast Write Cache Option Card battery Possible failure conditions for the ssa_format command include v No Fast Write Cache Option Card is present on the adapter card v The fast write cache is not empty Data is waiting to be written to another device This message is displayed...

Page 379: ...he Option Card is not set to zero Important Do not select the b flag unless you have exchanged the battery Otherwise no error message will occur when the battery reaches the end of its life Output The ssa_format command sends all error messages to stderr Chapter 16 Using the SSA Command Line Utilities 359 ...

Page 380: ...as been powered on c Shows the state of the fast write cache Output The ssa_fw_status command sends all error messages to stderr and output to stdout Examples v To show the status of the Fast Write cache on an SSA adapter give the command ssa_fw_status a ssa0 v To show the life of the battery give the command ssa_fw_status a ssa0 l v To show the number of hours for which the battery has been power...

Page 381: ...10 31 12 123 1234567890ABCDEF pdisk22 12 1 5 4 12345 ssa0 _xx 10 32 12 456 234567890ABCDEF1 pdisk22 3 13 5 3 12346 ssa1 961120 10 50 12 123 1234567890ABCDE7 pdisk22 7 1 5 4 12345 You can switch off the headings by using the h flag Where possible the ssa_getdump command translates the adapter UID into the adapter name for example ssa0 If the command cannot translate the adapter UID it leaves the AD...

Page 382: ...tFile Specifies where the tar command is to write its output You must use at least one of these flags a AdapterName Specifies the adapter name for which the program must search for example ssa1 The adapter must be known to the searching machine n AdapterUID Specifies the adapter UID for which the program must search The adapter need not be known to the searching machine s SlotNumber Specifies the ...

Page 383: ... the dump Output The ssa_getdump command sends all error messages to stderr and the following to stdout v Header messages v List mode output v Copy progress messages The command generates these return codes 0 The command has completed successfully 1 Some parameters are not correct 2 The disk name is not valid or the pdisk is not present 3 The name of the SSA adapter is not correct or not valid 4 T...

Page 384: ...parameter is specified the disk is set into Identify mode While the disk is in Identify mode its amber Ready light flashes at approximately one second intervals The n flag switches off Identify mode Flags l PhysicalDiskName Specifies the device to place into Identify mode y Switches on Identify mode n Switches off Identify mode 364 User s Guide and Maintenance Information ...

Page 385: ...ss of the format operation that the ssa_format l pdisk command started Flags l Pdisk Specifies the pdisk of whose format operation you want to check progress and status Output The ssa_progress command sends error messages to stderr and progress messages to stdout Examples v If the disk has been 30 formatted the following messages are displayed ssa_progress l pdisk Formatting 30 v If the disk is no...

Page 386: ...d the disk drive Fail Access to the disk drive is not possible Busy The disk drive is reserved to another adapter or using system Notes 1 For an SSA Enhanced Adapter Busy means that another adapter has reserved the disk drive If both adapters are in the same using system the other adapter shows OK or Open 2 For an SSA Enhanced RAID Adapter Busy means that the disk drive is reserved The Reserved To...

Page 387: ...wo adapters are in the same using system the Busy status indicates that the node number is not set Disk Primary Secondary Adapter Primary Secondary Reserved Adapter Adapter In Use Access Access to hdisk2 ssa1 ssa0 ssa1 Open Busy ssa1 The next example shows that the disk drive is reserved to a node because the secondary access is OK not Busy and the Reserved To field shows the using system name Dis...

Page 388: ...ice Mode has been successfully set or reset the IACL command closes the adapter special file If Service Mode cannot be set or reset for any reason the cop command prints the appropriate error message Flags l pdisk Specifies the pdisk that you want to put into or remove from Service Mode a AdapterName Specifies the adapter to which the pdisk is connected y Puts the pdisk into Service Mode set Servi...

Page 389: ...ameters are A a B b for example p A p b n Network Causes the ssa_speed command to show the operating speed of all ports on the selected network Valid Network parameters are A a B b for example n A n b x Causes the ssa_speed command to test each adapter on the using system for link speed exceptions on all nodes To do this the command inspects the Supported Speed and the Current Speed for each pair ...

Page 390: ... link speed of pdisk0 give the command ssa_speed l pdisk0 v To display the adapter link speeds of ports A1 and A2 on ssa0 give the command ssa_speed a ssa0 p A v To display the adapter link speeds of all the devices in network B on ssa0 give the command ssa_speed a ssa0 n B v To find link speed exception conditions give the command ssa_speed x 370 User s Guide and Maintenance Information ...

Page 391: ...re SSA User Configuration Error Node Number 1 is set on both Local Host abc somewhere ibm com and Remote Host xyz This message says that a problem exists between your machine abc and another machine xyz that is connected through the SSA network The names shown are the DNS names of the machines Flags w Turns on the network wide check It checks local node numbers against remote node numbers and remo...

Page 392: ...Description If the parameter is a logical disk the output is a list of names of the physical disks that provide support for that logical disk If the parameter is a physical disk the output is a list of names of the logical disks that use that physical disk Flags l DiskName Specifies the logical or physical disk 372 User s Guide and Maintenance Information ...

Page 393: ...wnload Disk Drive Microcode This service aid allows you to observe and modify the microcode level on all the SSA disk drives v Link Speed This service aid allows you to observe the operating speed of each link on an SSA loop v Physical Link Configuration This service aid provides support for SES enabled SSA enclosures subsystems See your enclosure service information for a description of this serv...

Page 394: ...Note The service aids refer to the Advanced SerialRAID Adapter as IBM SSA 160 SerialRAID Adapter 14109100 On some service screens this name is shortened 374 User s Guide and Maintenance Information ...

Page 395: ...ll you when you can select the Identify function The service aids display the serial numbers of the devices By checking the serial number label on the device you can verify that the correct device has its Check light flashing Note Normally you can reset the Identify function by selecting to switch it off from inside a service aid display or by leaving that particular service aid display If however...

Page 396: ...nfiguration Verification Format Disk Certify Disk Display Download Disk Drive Microcode Link Speed Physical Link Configuration Enclosure Configuration Enclosure Environment Enclosure Settings SMIT SSA RAID Arrays SMIT SSA Disks F3 Cancel F10 Exit Notes a In some configurations of the using system console Esc and 0 Exit Esc and 3 Cancel In such configurations however the displayed instructions for ...

Page 397: ...rvice Aid on page 378 Link Verification Service Aid on page 383 Configuration Verification Service Aid on page 387 Format Disk Service Aid on page 389 Certify Disk Service Aid on page 391 Display Download Disk Drive Microcode Service Aid on page 393 Link Speed Service Aid on page 396 Chapter 17 SSA Service Aids 377 ...

Page 398: ...therwise an error occurs SSA devices can be maintained concurrently that is they can be removed installed and tested on an SSA loop while the other devices on the loop continue to work normally If a disk drive has its Check light on the pdisk might not be configured If the pdisk is not configured you cannot select Service Mode Under these conditions you can remove the disk drive from the SSA loop ...

Page 399: ...ical Disk Drive systemname pdisk5 AC7C6E51 2GB SSA C Physical Disk Drive systemname pdisk6 AC706E9A 2GB SSA C Physical Disk Drive systemname pdisk7 AC1DEEE2 2GB SSA C Physical Disk Drive systemname pdisk8 AC1DBE32 2GB SSA C Physical Disk Drive F3 Cancel F10 Exit The columns of information displayed on the screen have the following meanings systemname Name of the using system to which the disk driv...

Page 400: ...C50AE43 4GB SSA C Physical Disk Drive Move cursor onto selection then press Enter Set or Reset Identify Select this option to set or reset the Identify indicator on the disk drive Set or Reset Service Mode Select this option to set or reset Service Mode on the disk drive ENSURE THAT NO OTHER HOST SYSTEM IS USING THIS DISK DRIVE BEFORE SELECTING THIS OPTION F3 Cancel F10 Exit 380 User s Guide and M...

Page 401: ...Drive systemname pdisk8 AC1DBE32 2GB SSA C Physical Disk Drive F3 Cancel F10 Exit Notes a You can select only one disk drive at time b If you select Service Mode and the selected disk drive is not in a closed loop or at the end of a string see Chapter 2 Introducing SSA Loops on page 7 your selection fails and an error message is displayed Use the Link Verification service aid to identify any open ...

Page 402: ...function now Only one disk drive at a time can be in Service Mode The list of pdisks appears again The pdisk that is in Identify Mode is identified by a SET SERVICE MODE 802381 Move cursor onto selection then press Enter systemname pdisk0 AC50AE43 2GB SSA C Physical Disk Drive systemname pdisk1 AC706EA3 2GB SSA C Physical Disk Drive systemname pdisk2 AC1DBE11 2GB SSA C Physical Disk Drive systemna...

Page 403: ...RAID Adapter nunu ssa1 04 04 IBM SSA 160 SerialRAID Adapter nunu ssa2 04 07 IBM SSA 160 SerialRAID Adapter F3 Cancel F10 Exit 2 Select the adapter that you want to test The columns of information displayed on the screen have the following meanings v The first column shows the adapter name The format of the adapter name is systemname adaptername for example nunu ssa0 where systemname is the name of...

Page 404: ...ing meanings v The Physical column lists the devices as they appear on the SSA loop A device can be either a pdisk or an adapter If the device is a pdisk it is listed as systemname pdiskname for example nunu pdisk3 where systemname is the name of the using system to which the pdisk is connected adaptername is the physical disk drive resource identifier If the device is an adapter it is listed as s...

Page 405: ...ink must be configured in a loop around which data can travel in either direction The loop is broken if a cable fails or is removed or if a disk drive fails Because each disk drive on the loop can be accessed from either direction the broken loop does not prevent access to any data unless that data is on the failed disk drive If the loop is broken between two disk drives the Ready lights on those ...

Page 406: ...erialRAID Adapter To Set or Reset Identify move cursor onto selection then press Enter Physical Serial Adapter Port A1 A2 B1 B2 Status TOP nunu pdisk1 AC515E90 0 Good nunu pdisk2 AC515EAB 1 Good nunu pdisk3 AC515EB1 1 Good nunu pdisk4 AC515EB9 0 Good ganges ssa0 A 0 7 nunu pdisk6 AC51606E 1 6 Good 2 5 Good nunu pdisk0 AC506D6E 3 4 Good MORE 4 F3 Cancel F10 Exit This example shows that the SSA loop...

Page 407: ...system that disk drive is configured only as a pdisk during the configuration of the using system In such an instance use the Format service aid to reformat the disk drive then give the cfgmgr command to correct the condition To use the Configuration Verification service aid 1 Select Configuration Verification from the SSA Service Aids menu see Starting the SSA Service Aids on page 376 A list of p...

Page 408: ...r Port SSA_Addr Status systemname pdisk0 AC51DB47 00 02 A1 0 Good 00 02 A2 1 Good F3 Cancel F10 Exit If you select a pdisk a list of hdisks is displayed CONFIGURATION VERIFICATION 802392 systemname pdisk0 AC51DB47 4GB SSA C Physical Disk Drive Move cursor onto selection then press Enter systemname hdisk2 AC51DB47 SSA Logical Disk Drive Good F3 Cancel F10 Exit Note If you select the hdisk from this...

Page 409: ... cursor onto selection then press Enter systemname pdisk11 AC50AE43 9 1GB SSA C Physical Disk Drive systemname pdisk8 AC706EA3 9 1GB SSA C Physical Disk Drive systemname pdisk2 AC1DBE11 4GB SSA C Physical Disk Drive systemname pdisk3 AC1DBEF4 4GB SSA C Physical Disk Drive systemname pdisk7 AC50AE58 9 1GB SSA C Physical Disk Drive systemname pdisk12 AC7C6E51 9 1GB SSA C Physical Disk Drive systemna...

Page 410: ...G DESTROYS ALL DATA ON THE DISK DRIVE F3 Cancel F10 Exit 3 If you are not sure of the identification pdisk number of the disk drive that you want to format use the Identify function to get a positive physical identification of the disk drive see The Identify Function on page 375 You can further ensure that you have selected the correct disk drive by verifying that the serial number on the front of...

Page 411: ...ion then press Enter systemname pdisk11 AC50AE43 9 1GB SSA C Physical Disk Drive systemname pdisk8 AC706EA3 9 1GB SSA C Physical Disk Drive systemname pdisk2 AC1DBE11 4GB SSA C Physical Disk Drive systemname pdisk3 AC1DBEF4 4GB SSA C Physical Disk Drive systemname pdisk7 AC50AE58 9 1GB SSA C Physical Disk Drive systemname pdisk12 AC7C6E51 9 1GB SSA C Physical Disk Drive systemname pdisk0 AC706E9A ...

Page 412: ...Cancel F10 Exit 3 If you are not sure of the identification pdisk number of the disk drive that you want to certify use the Identify function to get a positive physical identification of the disk drive see The Identify Function on page 375 You can further ensure that you have selected the correct disk drive by verifying that the serial number on the front of the disk drive is the same as the seria...

Page 413: ...e to disk drives that are in use By doing so however you might cause a temporary delay in the operating system or in the user s application program Do not download microcode to a disk drive that is in use unless you have the user s permission Always refer to the download instructions that are supplied with the microcode and check for any special restrictions that might be applicable If you are not...

Page 414: ...ives Select this option to change the level of microcode that is installed on selected Available SSA disk drives Download Microcode to all SSA Physical Disk Drives Select this option to load the latest level of microcode on all Available SSA disk drives F3 Cancel F10 Exit 2 To display the levels of microcode that are installed on the SSA disk drives select Display the Microcode levels of all SSA P...

Page 415: ...y select this option when you do not want the microcode on the selected disk drive to be at the latest available level 4 If you have a new level of microcode to install or if you have replaced a disk drive and want to upgrade it to the present level select Download Microcode to all SSA Physical Disk Drives This option ensures that all disk drives have the latest level of microcode installed It dow...

Page 416: ...e SSA Service Aids menu see Starting the SSA Service Aids on page 376 A list of adapters is displayed LINK SPEED 802437 Move cursor onto selection then press Enter systemname ssa0 00 03 IBM SSA 160 SerialRAID Adapter systemname ssa1 00 04 IBM SSA 160 SerialRAID Adapter systemname ssa2 00 05 IBM SSA 160 SerialRAID Adapter F3 Cancel F10 Exit 396 User s Guide and Maintenance Information ...

Page 417: ... systemname pdisk2 systemname pdisk2 20 systemname pdisk1 systemname pdisk1 40 systemname pdisk0 systemname pdisk0 40 systemname ssa0 A2 systemname ssa0 B1 40 systemname pdisk5 systemname pdisk5 40 systemname pdisk4 systemname pdisk4 40 systemname ssa0 B2 F3 Cancel F10 Exit The screen shows an adapter that has four disk drives connected between ports A1 and A2 and two disk drives connected between...

Page 418: ... flow The Speed field indicates the operating speed of the link as follows 00 The link is not operational 20 20 MB per second 40 40 MB per second Figure 54 gives a physical representation of the configuration that is shown on the screen B2 B1 A2 A1 Disk 4 Disk 5 Disk 0 Disk 1 Disk 2 Disk 3 40 MB s 40 MB s 40 MB s 40 MB s 20 MB s 40 MB s 40 MB s 40 MB s Figure 54 Configuration Shown by the Service ...

Page 419: ... systemname pdisk2 00 00 systemname pdisk1 systemname pdisk1 40 systemname pdisk0 systemname pdisk0 40 systemname ssa0 A2 systemname ssa0 B1 40 systemname pdisk5 systemname pdisk5 40 systemname pdisk4 systemname pdisk4 40 systemname ssa0 B2 F3 Cancel F10 Exit Figure 55 gives a physical representation of the configuration that is shown on the screen B2 B1 A2 A1 Disk 4 Disk 5 Disk 0 Disk 1 Disk 2 Di...

Page 420: ...lained in the main SRN table see Service Request Numbers SRNs on page 411 Using the Service Aids for SSA Link Problem Determination If you have a problem with an SSA loop use the Link Verification service aid see Link Verification Service Aid on page 383 The following examples show various loops and the associated information that is displayed by the Link Verification service aid 400 User s Guide ...

Page 421: ... connectors B1 and B2 of the same SSA adapter Disk drives 13 through 16 are connected to connectors A1 and A2 of a different SSA adapter 2 Using system Disk 1 Disk 2 Disk 3 Disk 4 Disk 5 Disk 6 Disk 7 Disk 8 Disk 16 Disk 15 Disk 14 Disk 13 Disk 12 Disk 11 Disk 10 Disk 9 Using system A1 A2 B1 B2 A1 A2 B1 B2 Figure 56 Normal Loop Chapter 17 SSA Service Aids 401 ...

Page 422: ...ort A1 A2 B1 B2 Status TOP systemname pdisk11 AC50AE43 0 5 Good systemname pdisk8 AC706EA3 1 4 Good systemname pdisk2 AC1DBE11 2 3 Good systemname pdisk3 AC1DBEF4 3 2 Good systemname pdisk7 AC50AE58 4 1 Good systemname pdisk12 AC7C6E51 5 0 Good systemname pdisk0 AC706E9A 0 5 Good systemname pdisk1 AC1DEEE2 1 4 Good systemname pdisk10 AC1DBE32 2 3 Good MORE 4 F3 Cancel F10 Exit Note Scroll the disp...

Page 423: ...A cable has been disconnected from connector A2 Disk drives 9 through 12 are connected to connectors B1 and B2 of the same SSA adapter Disk drives 13 through 16 are connected to connectors A1 and A2 of a different SSA adapter 2 Although the broken loop is reported as an error all the disk drives can still communicate with the using system Disk drives 1 through 8 can communicate through connector A...

Page 424: ... 2 Disk 3 Disk 4 Disk 5 Disk 6 Disk 7 Disk 8 Disk 16 Disk 15 Disk 14 Disk 13 Disk 12 Disk 11 Disk 10 Disk 9 Using system A1 A2 B1 B2 A1 A2 B1 B2 Figure 57 Broken Loop Cable Removed 404 User s Guide and Maintenance Information ...

Page 425: ...nter Physical Serial Adapter Port A1 A2 B1 B2 Status TOP systemname pdisk11 AC50AE43 0 Good systemname pdisk8 AC706EA3 1 Good systemname pdisk2 AC1DBE11 2 Good systemname pdisk3 AC1DBEF4 3 Good systemname pdisk7 AC50AE58 4 Good systemname pdisk12 AC7C6E51 5 Good systemname pdisk0 AC706E9A 6 Good systemname pdisk1 AC1DEEE2 7 Good MORE 8 F3 Cancel F10 Exit Note that the column for adapter connector ...

Page 426: ...d A2 of a different SSA adapter 2 Although the missing disk drive is reported as an error all the remaining disk drives can still communicate with the using system Disk drives 1 and 2 can communicate through connector A1 of the SSA adapter 1 Disk drives 4 through 8 can communicate through connector A2 of the SSA adapter Disk drives 9 through 12 can communicate through connectors B1 and B2 of the s...

Page 427: ...Disk 2 Disk 3 Disk 4 Disk 5 Disk 6 Disk 7 Disk 8 Disk 16 Disk 15 Disk 14 Disk 13 Disk 12 Disk 11 Disk 10 Disk 9 Using system A1 A2 B1 B2 A1 A2 B1 B2 Figure 58 Broken Loop Disk Drive Removed Chapter 17 SSA Service Aids 407 ...

Page 428: ...rial Adapter Port A1 A2 B1 B2 Status TOP systemname pdisk11 AC50AE43 0 Good systemname pdisk8 AC706EA3 1 Good systemname pdisk3 AC1DBEF4 4 Good systemname pdisk7 AC50AE58 3 Good systemname pdisk12 AC7C6E51 2 Good systemname pdisk0 AC706E9A 1 Good systemname pdisk1 AC1DEEE2 0 Good systemname pdisk10 AC1DBE32 0 7 Good MORE 7 F3 Cancel F10 Exit Note that the missing disk drive pdisk8 is represented b...

Page 429: ...Available Finding the Device When No Service Aids Are Available When no service aids are available you must find the device by using the port P and SSA address AA values that are provided by some service request numbers SRNs Examples of these SRNs are 43PAA 44PAA and 45PAA The port P values are related to the port connectors of the adapter 0 Connector A1 1 Connector A2 2 Connector B1 3 Connector B...

Page 430: ...410 User s Guide and Maintenance Information ...

Page 431: ...m and the action you must take Possible Causes The condition or FRUs that might be causing the problem and how likely it is by percentage that a particular FRU is causing the problem Abbreviations used in the table are DMA Direct memory access FRU Field replaceable unit IOCC Input output channel controller PAA P Adapter port number AA SSA address see also Finding the Device When No Service Aids Ar...

Page 432: ...ucted to do so 3 Normally exchange only one FRU at a time After each FRU is exchanged go to MAP 2410 SSA Repair Verification on page 475 to verify the repair 4 When exchanging an adapter always use the instructions that are supplied with the system unit 412 User s Guide and Maintenance Information ...

Page 433: ...ed Action Go to MAP 2323 SSA Intermittent Link Error on page 450 Possible FRUs Device 45 Exchanging Disk Drives on page 319 SSA adapter card 45 Removing and Replacing an Advanced SerialRAID Adapter on page 327 External SSA cables 6 Internal SSA connections 4 enclosure service information 2A002 Description Async code 02 has been received Probably a software error has occurred Action Go to Software ...

Page 434: ...ur SSA enclosure or SSA subsystem Not applicable 303FE Description A disk drive microcode error has been detected Action Go to Software and Microcode Errors on page 441 Software error Possible FRUs Device 100 Exchanging Disk Drives on page 319 303FF Description An SCSI status that is not valid has been received Action Go to Software and Microcode Errors on page 441 Possible FRUs Device 100 Exchang...

Page 435: ... 30 Exchanging Disk Drives on page 319 SSA adapter card 10 Removing and Replacing an Advanced SerialRAID Adapter on page 327 40000 Description The SSA adapter card has failed Action Exchange the FRU for a new FRU Possible FRUs SSA adapter card 100 Removing and Replacing an Advanced SerialRAID Adapter on page 327 40016 Description A 16 MB SDRAM in the adapter card module has failed Action Exchange ...

Page 436: ...moving and Replacing an Advanced SerialRAID Adapter on page 327 42200 Description Other adapters on the SSA loop are using levels of microcode that are not compatible Action Install the latest level of adapter microcode onto all the other adapters on this SSA loop User or service action 42500 Description The Fast Write Cache Option Card has failed Action 1 Exchange the cache card for a new one 2 S...

Page 437: ...ache card is installed correctly it might have failed Exchange for new FRUs the FRUs that are shown in the list of possible FRUs for this SRN v If the Fast Write feature is not installed and you want to delete the fast write configuration for one or more disk drives that have been added to this subsystem a Verify with the customer that the fast write configuration can be deleted for the disk drive...

Page 438: ...te option see Configuring the Fast Write Cache Feature on page 211 3 If this error has occurred because the Fast Write Option Card has been switched off for more than seven days or if the Fast Write Option Card battery has been disconnected clear the contents of the fast write cache type the command ssa_format l AdapterName where AdapterName is the name of the adapter that contains the fast write ...

Page 439: ...the Fast Write option is offline All other devices that are connected to the failing adapter and have the Fast Write option enabled For instructions on how to disable the Fast Write option see Dealing with Fast Write Problems on page 218 2 Exchange the Fast Write Cache Option Card for a new one 3 Ask the customer to re enable the Fast Write option for the devices that are attached to the new Fast ...

Page 440: ...or instructions on how to disable the Fast Write option see Dealing with Fast Write Problems on page 218 2 If the Fast Write option has been disabled for a RAID 5 array the hdisk for that array can no longer be configured Delete the RAID 5 array then recreate it For instructions on how to delete the array see Deleting an SSA RAID Array on page 70 3 Ask the customer to re enable the Fast Write opti...

Page 441: ...ing system has been switched on for less than one hour wait for the battery to complete charging If the using system has been switched on for more than one hour run diagnostics to the adapter in System Verification mode If the same SRN is generated exchange the FRU for a new FRU The using system has recently been switched on The battery is still charging Possible FRUs Fast Write Cache Option Card ...

Page 442: ...e RaidManager is the SSA adapter that is managing the fast write device and hdiskn is the hdisk number that you noted in step 5 v An unexpected loss of power has occurred on the using system v The user has stopped an uncouple operation 42540 Description Two way fast write for a disk drive is configured to operate only when both caches are available One cache however is now not available Action 1 I...

Page 443: ...s on page 319 45PAA Description The SSA adapter has detected an open SSA loop Action If the SSA service aids are available run the Link Verification service aid see Link Verification Service Aid on page 383 to determine which part of the SSA loop is failing If the SSA service aids are not available note the value of PAA in this SRN and go to Finding the Physical Location of a Device on page 409 Th...

Page 444: ... to the adapter Action The system user must delete from the SSA adapter the details of old arrays see Deleting an Old RAID Array Recorded in an SSA RAID Manager on page 133 If no details of old arrays are present or if existing old arrays cannot be removed exchange the FRU for a new FRU User action Possible FRUs SSA adapter card 100 Removing and Replacing an Advanced SerialRAID Adapter on page 327...

Page 445: ...to identify the disk drive 6 Move all the member disk drives to the same SSA loop SSA loop configuration problem 48700 Description All the member disk drives of an array are not on the same SSA loop The array is in the Offline state Action All the member disk drives of an array must be on the same SSA loop Find all the members of the array 1 Type smitty devices and press Enter 2 Select SSA RAID Ar...

Page 446: ...esolution flag is set to Primary v The SSA adapter can detect the primary half of the array but the Split Array Resolution flag is set to Secondary This problem can be caused by a power failure on one half of the array or by a broken SSA loop between the two halves of the array 48755 Description One of the following conditions exists v One member of a RAID 1 array has been detected but the adapter...

Page 447: ...us of All Defined SSA RAID Arrays 3 The failed hdisk is listed with Invalid data strips Make a note of the hdisk number 4 Ask the customer to make a backup of all data that is still readable and then to delete the failed array 5 When the array has been deleted run the following to each disk drive that was a member of the failed array v Diagnostics in System Verification mode v Certify service aid ...

Page 448: ...0 Run diagnostics in System Verification mode to all disk drives that are listed as rejected if any are listed 11 If the diagnostics run successfully run the Certify service aid see Certify Disk Service Aid on page 391 to the disk drive that caused this SRN 12 Run the Certify service aid see Certify Disk Service Aid on page 391 to all the disk drives that were members of the failed array 13 Run th...

Page 449: ...ID 10 mirror becomes degraded when one disk drive in the mirror pair is not available and a write command is sent to the array 49100 Description An array is in the Exposed state A disk drive can become not available for several reasons v The disk drive has failed v The disk drive has been removed from the subsystem v An SSA link has failed v A power failure has occurred Action If the SSA service a...

Page 450: ... logged the error 7 Observe the displayed list Note which SSA loop contains any array member disk drives that are listed with a protected state of no Devices that are in pool_A0 are connected to loop A Devices that are in pool_B are connected to loop B 8 If the status field for the unprotected array member disk drive is too_large the hot spare disk drive is not large enough to support that array c...

Page 451: ...pool that you noted in step 5 8 For each inconsistent spare pool a Check whether the number of hot spare disk drives that are in the pool matches the user s requirements b If necessary select Components to Add or Components to Remove to modify the hot spare disk drives that are in the pool c Set Hot Spares Minimum to the alarm value that the user has specified This number is normally one less than...

Page 452: ...Deciding how to Configure Hot Spare Disk Drive Pools on page 45 to determine the best hot spare configuration then go to step 14 14 Select Change Show Delete a Hot Spare Pool 15 Add the hot spare disk drives to the correct pool see Adding Disks to or Removing Disks from a Hot Spare Pool on page 86 16 Select Change Member Disks in an SSA RAID Array 17 Swap the pdisk whose name you noted in step 7 w...

Page 453: ...he hot spare disk drives that you created in step 6 The number of hot spare disk drives that are now in the assigned pool is less than the specified minimum number Possible FRUs Device 100 Exchanging Disk Drives on page 319 49540 Description Adapters that do not provide support for hot spare pools have been detected This problem has occurred because the cabling has changed or because an SSA adapte...

Page 454: ...listed as Note Other adapters in the SSA loop might also be listed as Exchange for new disk drives all pdisks that are not configured Possible FRUs Device 100 Exchanging Disk Drives on page 319 4BPAA Description A disk drive at PAA cannot be configured because its UID cannot be read Action If the SSA service aids are available 1 Run the Link Verification service aid see Link Verification Service A...

Page 455: ... mode to the SSA adapter If the diagnostics fail exchange the FRU for a new FRU If the diagnostics do not fail go to Software and Microcode Errors on page 441 before exchanging the FRU Possible FRUs SSA adapter card 100 Removing and Replacing an Advanced SerialRAID Adapter on page 327 50013 Description The SSA adapter card has failed Action Exchange the FRU for a new FRU Possible FRUs SSA adapter ...

Page 456: ...cation mode to the adapter If the diagnostics run successfully go to Software and Microcode Errors on page 441 before you exchange the adapter Possible FRUs SSA adapter card 70 Removing and Replacing an Advanced SerialRAID Adapter on page 327 Device 30 Exchanging Disk Drives on page 319 50425 Description The SSA adapter has detected an SS_LINK_CONFIG_FAILED error SSA devices cannot be configured b...

Page 457: ...d SerialRAID Adapter on page 327 60200 60210 Description SRNs in this range are not adapter SRNs Action For SRNs in this range see the documentation for your SSA enclosure or SSA subsystem Not applicable 60240 Description A configuration problem has occurred A device cannot be configured for some unknown reason Action Go to the START MAP for the enclosure in which the device is installed If no pro...

Page 458: ...code Action Exchange the FRU for a new FRU Note In this SRN an X represents a digit 0 through F Possible FRUs SSA adapter card 100 Removing and Replacing an Advanced SerialRAID Adapter on page 327 D6PAA Description A high speed SSA link is running at low speed This error is logged when the run_ssa_link_speed cron runs the ssa_speed utility Action 1 Read Cron Table Entries on page 313 before you ex...

Page 459: ...used by a failed application program Ask the user to end any failed application program then try to run the service aid again v Run diagnostics in Problem Determination mode to the system unit If you find any problems solve them then try to run the service aid again v Close down and reboot the using system then try to run the service aid again v Run diagnostics from diskette or CD ROM to isolate t...

Page 460: ...e the location code of the SSA adapter to which the hdisk is attached For example if the location code of the hdisk is 00 03 L the location code of the SSA adapter is 00 03 2 Run the Link Verification service aid see Link Verification Service Aid on page 383 to the SSA adapter 3 If a link failure is indicated by the service aid go to MAP 2320 SSA Link on page 445 4 If no link failures are indicate...

Page 461: ... than are allowed The maximum numbers allowed depend on the adapter Rules for SSA Loops on page 22 describes these details for each adapter If the SRN occurred when you or the customer switched on the using system 1 Switch off the using system 2 Review the configuration that you are trying to make and determine why that configuration is not valid 3 Correct your configuration by reconfiguring the S...

Page 462: ...u are trying to make and determine why that configuration is not valid 3 Correct your configuration by reconfiguring the SSA cables or by removing the excess devices or adapters from the loop 442 User s Guide and Maintenance Information ...

Page 463: ...wer the questions given in the MAPs v When instructed to exchange two or more FRUs in sequence 1 Exchange the first FRU in the list for a new one 2 Verify that the problem is solved For some problems verification means running the diagnostic programs see the using system service procedures 3 If the problem remains a Reinstall the original FRU b Exchange the next FRU in the list for a new one 4 Rep...

Page 464: ...that connect the devices to the using system can be disconnected while that system is running 1 Do you have an SSA subsystem 5 character SRN NO Go to step 2 YES Go to Service Request Numbers SRNs on page 411 2 from step 1 v If the system diagnostics are available go to step 3 v If the system diagnostics are not available but the stand alone diagnostics are available a Load the stand alone diagnost...

Page 465: ...ysical Location of a Device on page 409 YES Go to SSA Link Errors on page 478 to analyze the problem 3 from step 1 Run the Link Verification service aid see Link Verification Service Aid on page 383 and select the appropriate SSA adapter from the displayed Link Verification adapter menu If the service aid detects pdisks for the adapter you have selected a list of pdisks is displayed The diagram sh...

Page 466: ...tion described v No physical disks are connected to this SSA adapter a Ensure that the external SSA cables are correctly connected to the enclosures in which the devices are installed and to the SSA adapter b Go to MAP 2410 SSA Repair Verification on page 475 to verify the repair v All the disk drives are switched off Go to the START MAP for the enclosure in which the SSA devices are installed v T...

Page 467: ...k8 AC7AA2D6 1 4 Good nunu pdisk2 AC7AA0BD 2 3 Power nunu pdisk3 AC7AA0B1 3 2 Good nunu pdisk7 AC7AA0B5 4 1 Good nunu pdisk12 AC7AA052 5 0 Good nunu pdisk0 AC7AA0B9 0 5 Good nunu pdisk1 AC7AA0B3 1 4 Good nunu pdisk10 AC7AA0B4 2 3 Good MORE 4 F3 Cancel F10 Exit Does one of the pdisks have a Power status NO Go to step 5 on page 448 YES Go to the START MAP for the enclosure in which the SSA device is ...

Page 468: ...led nunu pdisk3 AC7AA0B1 3 2 Good nunu pdisk7 AC7AA0B5 4 1 Good nunu pdisk12 AC7AA052 5 0 Good nunu pdisk0 AC7AA0B9 0 5 Good nunu pdisk1 AC7AA0B3 1 4 Good nunu pdisk10 AC7AA0B4 2 3 Good MORE 4 F3 Cancel F10 Exit Is one of the pdisks failing NO Go to step 6 on page 449 YES a Use the Identify function as instructed on the screen to find the failing disk See Finding the Physical Location of a Device ...

Page 469: ...B5 4 1 Good nunu pdisk12 AC7AA052 5 0 Good nunu pdisk0 AC7AA0B9 0 5 Good nunu pdisk1 AC7AA0B3 1 4 Good nunu pdisk10 AC7AA0B4 2 3 Good MORE 4 F3 Cancel F10 Exit Is a link broken between two pdisks NO No trouble found YES a Find the devices that are on each side of the broken link The Identify function which is available on this display helps you to find the locations of pdisks See Finding the Physi...

Page 470: ... error has been logged see Link Verification Service Aid on page 383 A list of pdisks similar to the example given here is displayed LINK VERIFICATION 802386 SSA Link Verification for nunu ssa0 00 04 IBM SSA 160 SerialRAID Adapter To Set or Reset Identify move cursor onto selection then press Enter Physical Serial Adapter Port A1 A2 B1 B2 Status TOP nunu pdisk1 AC7AA09A 0 3 Good nunu pdisk2 AC7AA2...

Page 471: ...ce is the first of the two devices that are connected by the failing link If the SRN is in the series 21xxx through 29xxx the second device of the two is located at PAA 1 If the SRN is 33xxx the second device of the two is located at PAA 1 Note If the SSA address AA in the SRN is higher than the highest SSA address that is displayed for the adapter port P that address is the address of the SSA ada...

Page 472: ...002 the first device of the two is again pdisk3 The second device is pdisk4 PAA 1 LINK VERIFICATION 802386 SSA Link Verification for nunu ssa0 00 04 IBM SSA 160 SerialRAID Adapter To Set or Reset Identify move cursor onto selection then press Enter Physical Serial Adapter Port A1 A2 B1 B2 Status TOP nunu pdisk1 AC7AA09A 0 3 Good nunu pdisk2 AC7AA2D6 1 2 Good nunu pdisk3 AC7AA0BD 2 1 Good nunu pdis...

Page 473: ...etween the two devices that you identified in step 2 on page 450 Exchange in the sequence shown the following FRUs for new FRUs Ensure that for each FRU exchange you go to MAP 2410 SSA Repair Verification on page 475 to verify the repair a One of the two devices that are identified by the SRN see Exchanging Disk Drives on page 319 b The other of the two devices c The internal SSA connections of th...

Page 474: ...ll power problems SSA link problems and SSA disk drives that have a Failed status 3 Correct all those problems before you start this procedure Attention Some of the steps in this MAP need you to change the configuration of the array or to change the use of an SSA disk drive Do not do those steps unless you have the user s permission 1 from steps 3 28 and 29 You have been sent to this step either f...

Page 475: ...n array is in the Exposed state Go to step17 on page 463 49950 An array copy disk drive is missing Go to step 23 on page 467 5 from step 4 An array is in the Offline state if it contains at least one member disk drive but does not contain enough member disk drives to maintain data availability Are any disk drives missing or without power or have any disk drives been recabled not necessarily by you...

Page 476: ...system do the following a Type smitty ssaraid and press Enter b Select Delete an SSA RAID Array c Select the array that is in the Offline state and delete it All data that is on that RAID array is now lost d You must now locate and repair any failed disk drives and make those disk drives available for the creation of a new array Go to step 7 on page 457 v If no disk drives have been added to this ...

Page 477: ...is listed as rejected is not necessarily failing For example the array might have rejected the disk drive because a power problem or an SSA link problem caused that drive to become temporarily unavailable Under such conditions the disk drive can be reused If you think that a disk drive has been rejected because it is failing check the error log history for that disk drive For example if you suspec...

Page 478: ...ng screen Note This example screen shows the status of RAID 5 arrays The screen shows similar information if you select a RAID 1 array or a RAID 0 array COMMAND STATUS Command OK stdout yes stderr no Before command completion additional instructions may appear below Unsynced Parity Strips Unbuilt Data Strips hdisk3 0 0 Invalid data strip hdisk4 0 0 F1 Help F2 Refresh F3 Cancel F6 Command F8 Image ...

Page 479: ...articular disk drive NO Go to step 11 YES a Exchange the failing disk drive for a new one see Exchanging Disk Drives on page 319 b Go to step 37 on page 473 to add the disk drive to the group of disk drives that are available for use by the RAID manager 11 from step 10 Run the Certify service aid see Certify Disk Service Aid on page 391 to each of the pdisks that you noted previously Did the Certi...

Page 480: ...ve to the group of disk drives that are available for use by the RAID manager 13 from step 4 An array is in the Degraded state if one member disk drive of the array is missing or has failed and a write command has been sent to that array When an array is in the Degraded state its data is not protected a Type smitty ssaraid and press Enter b Select Change Show Use of an SSA Physical Disk c Go to st...

Page 481: ...if you suspect pdisk3 type on the command line ssa_ela l pdisk3 h 5 This command causes the error log for pdisk3 to be analyzed for the previous five days If a problem is detected an SRN is generated e Type smitty ssaraid and press Enter f Select Change Show Use of an SSA Physical Disk and for all disks that you have tested or exchanged change the Current Use to Array Candidate Disk g Select Chang...

Page 482: ...g to the displayed instructions exchange the failed member for a new disk drive The Disk to Remove is listed as BlankReserved the Disk to Add is the disk drive that you reinstalled or selected in step 16a When failed disk drives have been exchanged for new disk drives the data is rebuilt and the array changes its state to the Good state YES a Exchange the failed disk drive for a new one see Exchan...

Page 483: ...state No data rebuilding is necessary If data is written to an array that is in the Exposed state that data is not protected and the array goes into the Degraded state see Chapter 3 RAID Functions and Array States on page 29 for more information Command line parameters are available that allow you to prevent such write operations a Type smitty ssaraid and press Enter b Select Change Show Use of an...

Page 484: ...le if you suspect pdisk3 type on the command line ssa_ela l pdisk3 h 5 This command causes the error log for pdisk3 to be analyzed for the previous five days If a problem is detected an SRN is generated e Type smitty ssaraid and press Enter f Select Change Show Use of an SSA Physical Disk and for all disks that you have tested or exchanged change the Current Use to Array Candidate Disk g Select Ch...

Page 485: ...e The Disk to Remove is listed as BlankReserved the Disk to Add is the disk drive that you reinstalled or selected in step 20a When failed disk drives have been exchanged for new disk drives the data is rebuilt and the array changes its state to the Good state g Go to MAP 2410 SSA Repair Verification on page 475 to verify the repair YES a Exchange the failed disk drive for a new one see Exchanging...

Page 486: ...of Hot Spares attribute to No YES The following conditions must be met to make a hot spare disk drive available for use by an array v The hot spare disk drive and the array must be on the same SSA loop see Creating a Hot Spare Disk Drive on page 72 v If the spare_exact parameter is set to true the size of the hot spare disk drive must be the same as the size of the smallest member disk drive in th...

Page 487: ... complete normally The array copy however cannot be uncoupled until the missing disk drive has been replaced and contains an exact copy of the data that is on the array a Type smitty ssaraid and press Enter b Select Array Copy Services c Select List All Copy Candidates d Note the hdisk that is in the Degraded copy state e Return to the SSA RAID Arrays menu f Select Change Show Use of an SSA Physic...

Page 488: ...hange Member Disks in an SSA RAID Array h Select Swap Members of an SSA RAID Array i Select the hdisk that is in the Degraded copy state that is the hdisk that you noted in step 23d on page 467 j Referring to the displayed instructions select a disk drive to remove from the array and the disk drive to add to the array The disk drive to remove is listed as not_present the disk drive to add is the d...

Page 489: ...see Exchanging Disk Drives on page 319 b Type smitty ssaraid and press Enter c Select Change Show Use of an SSA Physical Disk The pdisk that has been exchanged is listed under SSA Physical Disks that are system disks d Select the pdisk from the list and change the Current Use parameter to Array Candidate Disk e Select Change Member Disks in an SSA RAID Array f Select Swap Members of an SSA RAID Ar...

Page 490: ...ep 28 YES a Exchange the failing disk drive for a new one see Exchanging Disk Drives on page 319 b Go to step 37 on page 473 to add the disk drive to the group of disk drives that are available for use by the RAID manager 28 from steps 22 and 27 a Type smitty ssaraid and press Enter b Select List All SSA RAID Arrays Connected to a RAID Manager c List the arrays that are connected to each SSA Adapt...

Page 491: ...ay on page 70 2 Run the Certify service aid see Certify Disk Service Aid on page 391 to each member disk drive 3 Recreate the array see Adding an SSA RAID Array on page 60 4 Go to MAP 2410 SSA Repair Verification on page 475 to verify the repair 31 from step 30 Have disk drives been going into the rejected state with no other failure indications NO Go to step 32 YES This problem can occur if an ar...

Page 492: ...rives that were originally assigned to that pool If you have exchanged a failing disk drive and changed its use to Hot Spare Disk or Array Candidate Disk add that disk drive to the reduced hot spare pool To do this action a Type smitty ssaraid and press Enter b Select Change Show Delete a Hot Spare Pool c Select the adapter and press Enter d Select the hot spare pool and press Enter e Select Compo...

Page 493: ...ake the choice of Current Use parameter That choice should be v Hot Spare Disk if the use of hot spares is enabled for the arrays on the subsystem v Array Candidate Disk if the use of hot spares is disabled for the arrays on the subsystem e Go to step 38 on page 474 YES When a new disk drive has been added to the system it is configured as a system disk drive If the disk drive replacement procedur...

Page 494: ...in turn each SSA adapter d If you are using pools other than A0 and B0 the hot spare pool to which the exchanged disk drive must now be added is listed with a status of reduced critical or empty e If multiple disk drives have been exchanged and multiple hot spare pools exist either ask the customer which disk drives are to be assigned to which hot spare pools or see Chapter 5 Hot Spare Management ...

Page 495: ...tics otherwise errors might be logged on other using systems that share the same loop b Go to step 4 on page 476 YES Go to step 2 2 from step 1 Before you arrived at this MAP you exchanged one or more FRUs for new FRUs Some of those FRUs have Power lights for example disk drives and fan and power supply assemblies If none of the FRUs that you exchanged has a Power light go to step 3 If some or all...

Page 496: ... 4 in this MAP Do you have any other SRN NO Go to step 7 on page 477 YES Go to Service Request Numbers SRNs on page 411 6 from step 4 Have you have exchanged all the FRUs that were originally reported by the SRN NO Exchange the next FRU that is listed for the SRN YES a Run diagnostics in System Verification mode to all the adapters that are in this SSA loop b Run diagnostics in System Verification...

Page 497: ...our subsystem contains RAID arrays a Type smitty ssaraid and press Enter b Select List All Defined SSA RAID Arrays NO Run the repair verification or repair completion procedures that are defined by your using system YES Go to the RAID Checkout at step 22 on page 467 of MAP 2324 SSA RAID Chapter 18 SSA Problem Determination Procedures 477 ...

Page 498: ...e normal MAPs to solve a link error problem you can refer directly to the link status lights to isolate the failing FRU as described here In an SSA loop SSA devices are connected through two or more SSA links to an SSA adapter Each SSA link is the connection between two SSA nodes devices or adapters for example disk drive to disk drive adapter to disk drive or adapter to adapter An SSA link can co...

Page 499: ...o disk drives that are in the same subsystem It has five parts Internal Connection Disk Drive 1 Disk Drive 2 SSA Subsystem Figure 59 Three Part Link in One Subsystem Internal Connection Dummy Disk Drive Disk Drive 1 Disk Drive 2 Internal Connection SSA Subsystem Figure 60 Five Part Link in One Subsystem Chapter 18 SSA Problem Determination Procedures 479 ...

Page 500: ... optical connectors instead of normal SSA cables SSA Connector Card Disk Drive Internal Connection SSA Connector Card Disk Drive Internal Connection Cable SSA Subsystem SSA Subsystem Figure 61 Seven Part Link in Two Subsystems Internal Connection SSA Connector Card Disk Drive Adapter Cable SSA Subsystem Figure 62 Five Part Link between Disk Drive and Adapter Fiber Optic Cables Adapter Adapter Opti...

Page 501: ...tions might have other indicators along the link for example SSA connector cards to help with FRU isolation The meanings of the disk drive and adapter lights are summarized here Status of Light Meaning Off Both SSA links are inactive Permanently on Both SSA links are active Slow flash two seconds on two seconds off Only one SSA link is active If your subsystem has other link status lights see the ...

Page 502: ...ORE 4 F3 Cancel F10 Exit This example screen shows a break in the SSA loop between the pdisk0 and pdisk10 In the condition shown by the display the Ready lights on the pdisk0 and pdisk10 are both flashing To help locate these disk drives select the pdisk and press Enter The Check light on the selected disk drive flashes This action does not affect the customer s operations For more information abo...

Page 503: ...Part 3 Appendixes 483 ...

Page 504: ...484 User s Guide and Maintenance Information ...

Page 505: ...es and connectors or by unauthorized changes or modifications to this equipment Unauthorized changes or modifications could void the user s authority to operate the equipment This device complies with Part 15 of FCC Rules Operation is subject to the following two conditions 1 this device may not cause harmful interference and 2 this device must accept any interference received including interferen...

Page 506: ...e protection requirements resulting from a non recommended modification of the product including the fitting of option cards not supplied by the manufacturer Radio Protection for Germany Zulassungsbescheinigung laut dem Deutschen Gesetz über die elektromagnetische Verträglichkeit von Geräten EMVG vom 30 August 1995 bzw der EMC EG Richtlinie 89 336 Dieses Gerät ist berechtigt in Übereinstimmung mit...

Page 507: ...Abstand bzw die Abschirmung zu der industriellen Störquelle zu vergrössern Anmerkung Um die Einhaltung des EMVG sicherzustellen sind die Geräte wie in den Handbüchern angegeben zu installieren und zu betreiben Taiwan Class A Compliance Statement Appendix Communications Statements 487 ...

Page 508: ...488 User s Guide and Maintenance Information ...

Page 509: ...ns couple To attach a copy array to a RAID 1 or RAID 10 array and copy data from the RAID 1 or RAID 10 array to that copy array The metadata of the copy array is updated to indicate that it is part of the parent RAID array The metadata of the parent array is updated to show that the copy array is to be used as a third copy The copy array is made offline and is no longer accessible D daemon In the ...

Page 510: ...of disk drives that contains pdisks and a hot spare disk drive The pool ensures that a hot spare disk drive is available if any pdisk in the group fails hot sparing The process by which a spare disk drive is automatically added to a RAID array to logically replace a member disk drive that has failed I interface Hardware software or both that links systems programs or devices IOCC Input output chan...

Page 511: ...l hardware disk drive POST Power on self test power on self test POST A series of diagnostic tests that are run automatically by a device when the power is switched on primary half The term that distinguishes one half of a split array The term secondary half distinguishes the other half of the split array R RAID Redundant array of independent disks RAID array In RAID systems a group of disks that ...

Page 512: ...ot spare disk U unconfigure a To take a device from the available configured state to the defined state b To take out of use by the existing computer system uncouple To separate the copy array from the parent RAID 1 or RAID 10 array The metadata of the copy array is updated to show that it is no longer part of the parent RAID array The metadata of the parent array is updated to show that it is no ...

Page 513: ...iles 260 head device driver interface 256 IOCINFO ioctl operation 261 description 261 files 261 purpose 261 adapter device driver continued managing dumps 259 open and close subroutines 258 PCI ODM attributes 257 responsibilities 255 SSA_GET_ENTRY_POINT ioctl operation 264 description 264 files 264 purpose 264 return values 264 SSA_TRANSACTION ioctl operation 262 description 262 files 263 purpose ...

Page 514: ...identifying system disk drives 127 identifying the disk drives in an SSA RAID array 119 installing a replacement disk drive 95 arrays continued installing and configuring 58 listing all defined SSA RAID arrays 100 listing all SSA RAID arrays that are connected to a RAID manager 102 listing all supported SSA RAID arrays 101 listing hot spare disk drives 111 listing old RAID arrays recorded in an SS...

Page 515: ...nued power 211 removing 336 blue and black cables 314 bring up SSA adapter ID 6 broken loop SSA link 403 406 buffer management SSA Target mode 293 bypassing the cache in a one way fast write network 217 C cables blue and black 314 Cancel all SSA Disk Identifications option 129 Certify Disk service aid 391 change and creation attributes hot spare pool 249 change and creation attributes RAID arrays ...

Page 516: ...Command Line Interface 237 commands add_hsm_pool_adap 83 addssaraid 140 chg_hsm_pool_adap 86 chgssadisk 72 144 chgssadisks 147 chgssardsk 214 chssaraid 135 exssaraid 95 142 iassaraid 127 icssaraid 125 ifssaraid 92 123 commands continued ihssaraid 121 issaraid 119 lassaraid 117 lcssaraid 115 lfssaraid 91 113 lhssaraid 111 ls_hsm_array_components 80 ls_hsm_array_status 77 ls_hsm_status 74 lsdssaraid...

Page 517: ...ices adapter device driver 257 configuring SSA disk drive devices 268 269 using mkdev to configure a logical disk 269 using mkdev to configure a physical disk 269 configuring the Fast Write Cache feature 211 configuring the SSA Target mode 292 copying data from an array 151 copying data from arrays and from volume groups 149 correcting or removing failed disk drives 91 couple action attributes RAI...

Page 518: ...6 IOCINFO ioctl operation 305 purpose 295 syntax 295 TMCHGIMPARM change parameters 308 device drivers continued tmssa continued TMIOSTAT status 307 trace formatting 256 device dependent routines tmssa device driver 296 close subroutine 297 ioctl subroutine 301 open subroutine 296 read subroutine 297 select entry point 301 write subroutine 299 device dependent subroutines adapter device driver 258 ...

Page 519: ...0 error logging detailed description 222 detail data formats 225 error logging continued detailed description continued duplicate node test 227 run_ssa_healthcheck cron 226 run_ssa_link_speed cron 227 summary 221 tmssa device driver 302 error logging management detailed description 228 summary 228 exchanging adapters and Rebuilding state RAID 5 34 exchanging disk drives 319 execution of Target Mod...

Page 520: ...pter type 4 P 6 installing a battery assembly into the fast write cache card 338 installing an SDRAM module 330 installing and configuring SSA RAID arrays 58 adding a disk drive to an SSA RAID array 140 adding a new hot spare pool 83 adding an SSA RAID array 60 adding disks to a hot spare pool 86 canceling all SSA disk drive identifications 129 changing member disks in an SSA RAID array 137 changi...

Page 521: ...st Status of Hot Spare Protection for an SSA RAID Array option 77 List System Disks option 117 List Identify SSA Physical Disks option 108 listing the disks that are in a hot spare pool 80 location code format 19 loops and data paths examples broken loop cable removed 403 broken loop disk drive removed 406 normal loops 401 loops links and data paths large configurations 16 one loop with two adapte...

Page 522: ...rray 60 adding disks to a hot spare pool 86 canceling all SSA disk drive identifications 129 changing member disks in an SSA RAID array 137 changing or showing the attributes of an SSA RAID array 135 changing or showing the status of a hot spare pool 74 changing or showing the use of an SSA disk drive 144 changing the use of multiple SSA physical disks 147 creating a hot spare disk drive 72 deleti...

Page 523: ...RAID array 142 RAID arrays change attributes 248 RAID arrays creation and change attributes 244 RAID Command Line Interface 235 action attributes 251 command syntax 237 couple action attributes 252 hot spare pool creation and change attributes 249 instruct types 238 object types 238 options 238 physical disk change attributes 249 RAID Command Line Interface continued RAID arrays change attributes ...

Page 524: ...ectors in the loop some shared data 25 rules for hot spare disk drive pools 52 run_ssa_ela_cron 232 run_ssa_healthcheck cron error logging 226 run_ssa_link_speed cron error logging 227 S SDRAM module installing 330 removing 329 select entry point tmssa device driver 301 serial storage architecture SSA 3 service aids 373 Certify Disk 391 Configuration Verification 387 service aids continued Display...

Page 525: ...cs 304 purpose 304 special files disk device driver 276 split site management 193 configuration of RAID 1 and RAID 10 arrays 193 operation after a loss of member disks 194 split site management continued adapter not known to remaining half of the array 203 one half of the array is not present 195 split and join procedure not performed correctly 205 SRNs service request numbers 411 SSA adapter devi...

Page 526: ...ys that are connected to a RAID manager 102 listing all supported SSA RAID arrays 101 listing array candidate disk drives 115 listing hot spare disk drives 111 listing old RAID arrays recorded in an SSA RAID manager 131 listing rejected array disk drives 113 SSA RAID arrays continued listing system disk drives 117 listing the disk drives in an SSA RAID array 109 listing the disks that are in a hot...

Page 527: ...egraded 37 Exposed 36 states of arrays RAID 10 continued Good 36 multiple 38 Offline 37 Rebuilding 37 Unknown 38 states of arrays RAID 5 33 Degraded 33 Exposed 33 read operations while in 33 write operations while in 33 flowchart 35 Good 33 initial rebuilding operation 34 Offline 34 Rebuilding 34 adapter replacement 34 disk drive replacement 34 summary of SSA error conditions 259 Swap Members in a...

Page 528: ...fics 304 purpose 304 top kernel extension entry point 288 trace formatting 256 two loops with one adapter 14 two loops with two adapters 15 U Uncouple a Volume Group Logical Volumes or File Systems Copy option 177 uncouple action attributes RAID 1 and RAID 10 252 force yes no 252 unique IDs SSA UIDs 21 Unknown state RAID 10 38 using mkdev to configure a logical disk 269 using mkdev to configure a ...

Page 529: ......

Page 530: ...Part Number 27H0678 Printed in the U S A SA33 3285 02 1P P N 27H0678 ...

Page 531: ...Spine information Advanced SerialRAID Adapters User s Guide and Maintenance Information ...

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