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Compaq 166207-B21 - Smart Array 5302/32 RAID Controller User Manual Download Page 114

Drive Arrays and Fault Tolerance

Compaq Smart Array 5300 Controller User Guide

D-9

COMPAQ CONFIDENTIAL

Writer: John Turner File Name: n-appd drive arrays and fault tolerance.doc

Codename: SilverHammer Part Number: 135606-004 Last Saved On: 7/22/02 11:02 AM

RAID ADG—Advanced Data Guarding

RAID ADG is similar to RAID 5 in that parity information is generated (and stored)
to protect against data loss caused by drive failure. With RAID ADG, however, two
different sets of parity data are used, allowing data to still be preserved if two drives
fail. As can be seen in Figure D-8, each set of parity data uses up a capacity
equivalent to that of one of the constituent drives.   

This method is most useful when data loss is unacceptable, but cost must also be
minimized. The probability that data loss will occur when arrays are configured with
RAID ADG is less than when they are configured with RAID 5 (for details, refer to
Appendix F).

B1

B3

P5,6

Q7,8

B2

B7

P3,4

Q5,6

B5

B8

P1,2

Q3,4

B4

B6

P7,8

Q1,2

Figure D-8:  Advanced data guarding (RAID ADG)

Advantages

•

 

High read performance

•

 

High data availability—any two drives can fail without loss of critical data

•

 

More drive capacity usable than with RAID 1+0—parity information requires
only the storage space equivalent to two physical drives

Summary of Contents for 166207-B21 - Smart Array 5302/32 RAID Controller

Page 1: ...ENTIAL Writer John Turner File Name a frnt doc Codename SilverHammer Part Number 135606 004 Last Saved On 5 23 02 12 42 PM Compaq Smart Array 5300 Controller User Guide Part Number 135606 004 May 2002 Fourth Edition ...

Page 2: ...rosoft Corporation in the U S and or other countries All other product names mentioned herein may be trademarks of their respective companies Compaq shall not be liable for technical or editorial errors or omissions contained herein The information in this document is provided as is without warranty of any kind and is subject to change without notice The warranties for Compaq products are set fort...

Page 3: ...n Text x Text Conventions xi Related Documents xi Getting Help xii Compaq Technical Support xii Compaq Website xii Compaq Authorized Reseller xiii Reader s Comments xiii Chapter 1 Board Components and Features Overview of Controller Features 1 4 Overview of Array Accelerator Features 1 5 Batteries 1 6 PCI System Interface 1 8 SCSI Support 1 8 Fault Management Features 1 8 Chapter 2 Installation Ov...

Page 4: ...Diskette 4 2 Creating a System ROMPaq Diskette from the CD 4 2 Creating a System ROMPaq Diskette from the SoftPaq File 4 2 Using the Diskette 4 3 Chapter 5 Updating the Controller Firmware Running Options ROMPaq from the CD 5 2 Running Options ROMPaq from Diskettes 5 3 Creating Diskettes Using the Smart Array Controller Support Software CD 5 3 Creating Diskettes Using the SmartStart CD 5 3 Creatin...

Page 5: ...Agents 8 2 Chapter 9 Upgrading and Replacing Options Array Accelerator 9 1 Battery Pack 9 4 2 to 4 Channel Adapter Board 9 8 Enabling RAID ADG 9 12 Using the Software Key 9 12 Using the Enabler Module 9 13 Appendix A Regulatory Compliance Notices Regulatory Compliance Identification Numbers A 1 Federal Communications Commission Notice A 1 Class A Equipment A 2 Class B Equipment A 2 Declaration of ...

Page 6: ...ance Methods D 5 RAID 0 No Fault Tolerance D 5 RAID 1 0 Drive Mirroring D 6 RAID 5 Distributed Data Guarding D 7 RAID ADG Advanced Data Guarding D 9 Other Fault Tolerance Options D 11 Appendix E Hard Drive Installation and Replacement General Information About Hard Drive Failure E 1 Recognizing Drive Failure E 2 Compromised Fault Tolerance E 4 Automatic Data Recovery E 5 General Aspects of Drive R...

Page 7: ...OMPAQ CONFIDENTIAL Writer John Turner File Name a frnt doc Codename SilverHammer Part Number 135606 004 Last Saved On 5 23 02 12 42 PM Appendix F Probability of Logical Drive Failure Appendix G POST Error Messages Appendix H Questions and Answers Glossary Index ...

Page 8: ...formation document provided Symbols on Equipment The following symbols may be placed on equipment to indicate the presence of potentially hazardous conditions WARNING This symbol in conjunction with any of the following symbols indicates the presence of a potential hazard The potential for injury exists if warnings are not observed Consult your documentation for specific details This symbol indica...

Page 9: ...surface is contacted the potential for injury exists WARNING To reduce the risk of injury from a hot component allow the surface to cool before touching These symbols on power supplies or systems indicate that the equipment is supplied by multiple sources of power WARNING To reduce the risk of injury from electric shock remove all power cords to completely disconnect power from the system Weight i...

Page 10: ...d for complete titles of published guides or variables Variables include information that varies in system output in command lines and in command parameters in text Bold type is used for emphasis for onscreen interface components window titles menu names and selections button and icon names and so on and for keyboard keys Monospace typeface is used for command lines code examples screen displays e...

Page 11: ...MPAQ This service is available 24 hours a day 7 days a week For continuous quality improvement calls may be recorded or monitored Outside North America call the nearest Compaq Technical Support Phone Center Telephone numbers for worldwide Technical Support Centers are listed on the Compaq website www compaq com Be sure to have the following information available before you call Compaq Technical su...

Page 12: ... 5 23 02 12 42 PM Compaq Authorized Reseller For the name of your nearest Compaq authorized reseller In the United States call 1 800 345 1518 In Canada call 1 800 263 5868 Elsewhere see the Compaq website for locations and telephone numbers Reader s Comments Compaq welcomes your comments on this guide Please send your comments and suggestions by email to ServerDocumentation compaq com ...

Page 13: ...nd the 5304 Model 5302 has two Wide Ultra3 SCSI channels and 128 MB of cache model 5304 has four Wide Ultra3 SCSI channels and 256 MB of cache You can upgrade the 5302 model to have four channels 256 MB of cache or both by means of the appropriate option kits 1 2 3 Figure 1 1 Smart Array 5304 Controller Ite m Description 1 Two internal 68 pin Wide SCSI connectors port 1 nearer the bracket port 2 n...

Page 14: ...odels ports 1 and 2 each have two connectors one internal and one external However only one connector can be used per port at any given time Ports 3 and 4 available on the 5304 can be used only for external drives 1 2 3 Figure 1 2 Smart Array 5302 Controller Ite m Description 1 Two internal 68 pin Wide SCSI connectors port 1 nearer the bracket port 2 nearer the board center 2 Two external VHDCI co...

Page 15: ...iter John Turner File Name b ch1 board components doc Codename SilverHammer Part Number 135606 004 Last Saved On 7 22 02 11 09 AM Figure 1 3 Two to four channel adapter upgrade option Figure 1 4 Array accelerator cache with batteries For details of the controller board specifications refer to Appendix C ...

Page 16: ... GB and LVD transfer rates up to 12 MB per second Support for the Compaq StorageWorks TM SAN Access Module Backward compatibility with Wide Ultra2 devices Removable array accelerator 64 bit 66 MHz PCI system interface Other features supported RAID fault tolerance 0 1 0 5 ADG refer to Chapter 9 for instructions on enabling RAID ADG Online RAID migration between any two levels Online array capacity ...

Page 17: ...process is quicker than delivering the data from a drive If the system writes new data to the same location the controller overwrites the cache contents This eliminates a drive write operation If the system performs a RAID 1 procedure the controller gets mirrored data from the cache instead of from host memory If the system performs a RAID 5 procedure the write cache collects enough data blocks fr...

Page 18: ...controller and installed on another controller of the same type Any data in the array accelerator that has not been written to the hard drive will be transferred to the other array controller Other features of the array accelerator include Cache capacity of 96 MB or 224 MB 32 MB of the cache is used for transfer buffer Adjustable read write ratio usually set during array configuration as described...

Page 19: ...y pack lasts for three years before replacement is necessary IMPORTANT The batteries on a new array controller may have a low charge when the controller board is first installed In this case a Power On Self Test POST message 1794 is displayed when the server is powered up refer to Appendix G indicating that the array accelerator is temporarily disabled No action is required on your part since the ...

Page 20: ...during high speed transfers freeing the system processor to handle application processing or other types of tasks For maximum performance Compaq recommends that you use only 66 MHz devices on any given 66 MHz PCI bus Combining 66 MHz and 33 MHz devices on a PCI bus will decrease the overall bandwidth to 33 MHz speeds SCSI Support The Smart Array 5300 Controller supports drives that conform to Wide...

Page 21: ... write head the seek error rate and the spin up time When a threshold value is exceeded for one of these factors the drive sends an alert that failure is imminent Thus the user can back up data and replace the drive before drive failure occurs NOTE An online spare does not become active and start rebuilding when the imminent failure alert is sent because the degraded drive has not actually failed ...

Page 22: ...or example by power fluctuation during ROM upgrade If corruption occurs the server automatically restarts using the remaining good copy of the ROM image When you upgrade the ROM the inactive image the one not being used by the system is upgraded There is not normally any noticeable difference in operation When you use Recovery ROM for the first time however both ROM images are upgraded causing a b...

Page 23: ...ts in Figure 2 1 and Figure 2 2 summarize the installation procedures for the most common scenarios Procedure for a New System 1 Install the controller hardware Chapter 3 if it is not pre installed 2 Update the system firmware Chapter 4 3 Update the controller firmware Chapter 5 5 Set the boot controller Chapter 6 4 Configure the system Chapter 6 6 Create at least one logical drive and format it C...

Page 24: ...pter 8 Otherwise continue with step 4 5 Set the controller order Chapter 6 4 Install the controller hardware Chapter 3 6 Update the controller firmware Chapter 5 7 If using the System Configuration Utility update the system partition Chapter 5 and then check the controller order Chapter 6 8 If the controller is not to be the boot device install the device driver for your operating system Chapter 8...

Page 25: ...re attempting the installation Many computers are capable of producing energy levels that are considered hazardous These computers are intended to be serviced by qualified personnel trained to deal with those hazards Do not remove enclosures or attempt to bypass any interlocks that may be provided for the purpose of removing these hazardous conditions If your server supports hot pluggable devices ...

Page 26: ...ripheral devices from the server WARNING To reduce the risk of personal injury from hot surfaces allow the internal system components and hot plug hard drives to cool before touching them CAUTION Electrostatic discharge ESD can damage electronic components Be sure that you are properly grounded before continuing the installation procedure See Appendix B for ESD information Installing the Smart Arr...

Page 27: ...or retaining screw 7 Continue by following the instructions given in Connecting the Cables Connecting the Cables Each port on the controller supports up to 14 drives Ports 1 and 2 each have two SCSI connectors one for external storage units and one for internal hard drives in the server The two connectors for a given port cannot be used simultaneously Ports 3 and 4 present on the 5304 model and al...

Page 28: ...g for Compaq Servers 1 If the device is not hot pluggable power down the system 2 Install drives into the removable media bays on the server Drives that are to be grouped in the same array should have the same capacity For detailed drive installation instructions consult the documentation that accompanied your drives The exact procedure from this point depends upon whether the device is hot plugga...

Page 29: ...ives CAUTION Cable assembly 148785 001 is included in option kit 166389 B21 and is required with Wide Ultra3 drives Failure to use this cable may result in reduced performance and or data loss For additional information about drive installation see Appendix E External Cabling for Compaq Servers All Compaq Storage Enclosure models include external SCSI cables Check the connector type on your storag...

Page 30: ...cable to the VHDCI connector on the Smart Array controller and then tighten the lock screws on the cable connector IMPORTANT Offset VHDCI cables must be used with the Smart Array 5300 controller Early versions of the VHDCI cables do not accommodate side by side connection of the cables to the Smart Array 5300 controller If your storage enclosure did not include the Offset VHDCI cables you may need...

Page 31: ... The Compaq SmartStart TM CD that is either shipped with your server or available directly from Compaq The downloadable Compaq SoftPaq TM file on the Compaq website If your server has a bootable CD ROM drive you can run System ROMPaq directly from the CD Otherwise you must run System ROMPaq from a diskette created from either the CD or from the SoftPaq file IMPORTANT Compare the version numbers of...

Page 32: ...uilder screen scroll through the list and select System ROMPaq Firmware Upgrade Diskette and then click Next 5 Select Create Diskettes Only and then click Next 6 Follow the remaining instructions on the screen to create the System ROMPaq diskette 7 To update the firmware follow the procedure given in Using the Diskette Creating a System ROMPaq Diskette from the SoftPaq File 1 Create a temporary di...

Page 33: ...is displayed select your server from the list of programmable devices and then press the Enter key The Select An Image screen is displayed showing the following information Device to reprogram your server Current ROM revision date of existing ROM version Select Firmware Images date of latest ROM version 5 Press the Enter key The Caution screen is displayed 6 Press the Enter key The following messa...

Page 34: ...ons such as drives run Options ROMPaq to make sure that these devices have the latest firmware Compaq recommends that you run the latest Options ROMPaq on all Compaq array controllers whenever new versions of the utility are released The Options ROMPaq utility has three main sources The SmartStart CD The Smart Array Controller Support Software CD The downloadable SoftPaq file on the Compaq website...

Page 35: ...now take depends on the message on the screen If the screen message reads as follows press the Enter key and then go to step 8 of these instructions The ROM image files found for the device selected are not newer than the current ROM image If the ROM firmware currently on the controller is older than that on the Options ROMPaq diskette then the screen message reads as follows Device to reprogram A...

Page 36: ...diskettes first create Options ROMPaq diskettes from one of the CDs or from the appropriate SoftPaq file Creating Diskettes Using the Smart Array Controller Support Software CD 1 Insert the Smart Array Controller Support Software CD into the server CD ROM drive tray 2 Open the OPTRMDSK folder on the CD and execute the QRST5 EXE file 3 Follow the on screen prompts to create the set of Options ROMPa...

Page 37: ...r hard drive 2 On the Compaq website locate the page containing the SoftPaq file for the Options ROMPaq utility 3 Click the link for the Options ROMPaq SoftPaq file 4 Click Download and direct the download to the temporary directory that you created 5 Click Save 6 Execute the downloaded SoftPaq file and follow the on screen instructions to create the diskette Up to six diskettes are needed for the...

Page 38: ...re currently on the controller is older than that on the Options ROMPaq diskette then the screen message reads as follows Device to reprogram All Compaq Smart Array nnnn Controller s Controller s Current ROM revision Compaq Smart Array nnnn Controller x xx Select Firmware Images Compaq Smart Array nnnn Controller y yy In this case press the Enter key and then go to step 7 7 Review the information ...

Page 39: ...e volumes with a 64 kbyte block size to decrease the amount of RAM required to mount the volume and use the Block Sub Allocation feature to allow disk space to be allocated more efficiently Linear memory provides the best system performance in the NetWare environment If you previously used SCU to configure your server this option would have been the default To check that the system is using linear...

Page 40: ...oot controller by using RBSU or the Option ROM Configuration for Arrays ORCA utility described in this chapter Create at least one logical drive by using ORCA or ACU as described in Chapter 7 Using RBSU RBSU is a system configuration utility that is embedded in the system ROM and is customized for the server that it is installed on Update RBSU when necessary by using System ROMPaq CAUTION Not all ...

Page 41: ...y User Guide 4 Select Boot Controller Order on the main RBSU screen and follow the on screen prompts to set the boot controller 5 When you have finished using the utility press the Esc key and then press the F10 key to confirm that you want to exit RBSU Using ORCA Part of the startup sequence of a server is the Power On Self Test POST If the array controller in the server supports ORCA POST tempor...

Page 42: ... SilverHammer Part Number 135606 004 Last Saved On 7 22 02 11 24 AM 3 On the Option ROM Configuration for Arrays Main Menu screen select Select as Boot Controller and follow the prompts to set the boot controller for the system If you want to use ORCA to create logical drives at this point you do not need to exit the utility yet Continue using ORCA as described in Chapter 7 ...

Page 43: ... apply to all configuration methods For the most efficient use of drive space do not mix drives of different capacity within the same array Each configuration utility treats all physical drives in an array as if they have the same capacity as the smallest drive in the array Excess capacity of larger drives is wasted because it is unavailable for data storage The probability that an array will expe...

Page 44: ...suggest the optimum configuration for an unconfigured controller 0 Describes configuration errors 0 0 Supports these operating systems Windows 2000 0 Windows NT 0 NetWare Linux 0 Allows these procedures Creation and deletion of arrays logical drives Assignment of RAID level Sharing of spare drive among several arrays 0 Assignment of multiple spare drives per array 0 Setting of stripe size 0 Migrat...

Page 45: ... about five seconds If ORCA is not supported the prompt message is not displayed and the system continues with the startup sequence While the prompt is displayed press the F8 key to start ORCA The ORCA main menu is displayed allowing you to select the boot controller for the system or to create view or delete a logical drive Figure 7 1 ORCA main menu screen To create a logical drive 1 Select Creat...

Page 46: ...Support Software CD and on the SmartStart CD You can run ACU directly from one of these CDs or if the server you are configuring is running the Microsoft Windows NT or Windows 2000 operating system you can download ACU onto your server and run it online When you start ACU it checks the configuration of every controller and drive array If an array is not configured optimally the ACU configuration w...

Page 47: ...g systems 1 Insert the CD into the CD ROM drive and restart the server 2 When the CD menu is displayed double click the ACU icon 3 Configure your array if you do not want to use the wizard refer to the Typical Manual Configuration Procedures in ACU section for detailed procedures 4 Remove the CD and restart the server to activate the new settings Running ACU while Online You can run ACU online wit...

Page 48: ...zard has finished or been bypassed the screen looks like Figure 7 2 This is the main ACU screen Figure 7 2 Main ACU screen This screen contains the following regions Menu bar Controller Selection drop down list Configuration View window Drive View box Controller box Array box Logical Drive box More Information button Some buttons will be grayed out You cannot select grayed out buttons until you se...

Page 49: ... to delete or change logical drives and to view drive information View Allows you to switch between Physical Configuration View and Logical Configuration View Help Allows you to access online help Controller Selection Drop Down List This lists the controllers that are installed in the system When you select a controller details of the drives and arrays that are connected to the controller are show...

Page 50: ...s to blink This feature is useful for identifying all physical drives in an array or logical drive all drives on a controller or a specific physical drive Drive View Box Select the radio buttons in this box to display a logical or physical configuration view in the configuration view window Figure 7 5 Drive View box Controller Box The buttons in the Controller box are activated when you select a c...

Page 51: ...splay the Modify Drive Array screen the Expand Array screen or the Create Logical Drive screen Logical Drive Box The buttons in the Logical Drive box are activated when you select a logical drive in the configuration view window Figure 7 8 Logical Drive box Click one of these buttons to display the Modify Logical Drive screen the Migrate Logical Drive screen or the Extend Logical Drive screen More...

Page 52: ...ill not affect the performance of an idle system However they will affect performance on a busy system On the High settings the controller will give preference to the rebuild or expansion process over normal I O operations On the Low settings the controller will rebuild or expand only when the controller is idle However this setting leaves the array vulnerable to drive failure for a longer time th...

Page 53: ...reate Logical Drive Screen section Table 7 2 and Table 7 3 Create Drive Array Screen To display this screen click Create Array in the Controller box Figure 7 6 on the main ACU screen Figure 7 10 Create Drive Array screen The three buttons in the middle of this screen from top to bottom are Assign Drive to Array Remove Drive from Array Assign Spare to Array The left hand panel of the screen shows a...

Page 54: ... of your array Expand Array Screen To display this screen click Expand in the Array box on the main ACU screen The Expand Array screen resembles the Create Drive Array screen Figure 7 10 It allows you to add more hard drives to an array that has already been configured The extra capacity can be used to build another logical drive on the array or to extend a logical drive that already exists on the...

Page 55: ...elect the width of a data stripe This width corresponds to the size of a data block on each hard drive in the logical volume as described in Appendix D Each RAID level supports several stripe widths Table 7 2 the default stripe size initially displayed by ACU is chosen for optimum performance under the most common operating conditions Table 7 3 suggests how to change the stripe width to optimize s...

Page 56: ...ted logical drive when using the chosen RAID level The left side of the slider scale shows how much drive capacity is available for data storage while the right side indicates how much capacity is required for storing parity or mirrored information RAID overhead is not needed for RAID 0 The default logical drive size first shown in this box is the maximum available for your drive array To create m...

Page 57: ...ze of 8 GB NOTE Enabling the maximum boot size may decrease performance of the logical drive Modify Logical Drive Screen To display this screen click Modify in the Logical Drive box Figure 7 8 on the main ACU screen This screen resembles the Create Logical Drive screen Figure 7 11 and lets you change the parameters of an existing logical drive while online without causing data loss Migrate RAID St...

Page 58: ...ing systems support online capacity extension For more information refer to the section Extending Logical Drive Capacity Figure 7 14 Extend Logical Drive screen Typical Manual Configuration Procedures in ACU When you launch ACU to configure a new array a configuration wizard opens to allow rapid automatic array configuration However you can bypass the wizard and manually Create a new array Expand ...

Page 59: ...lick Select 2 Click Controller Settings The Controller Settings screen is displayed Figure 7 9 3 Select the rebuild priority expand priority and accelerator ratio 4 Click Done to return to the main ACU screen Assigning Physical Drives of the Same Size to an Array 1 Click Create Array in the Controller box The Create Drive Array screen is displayed Figure 7 10 2 Select the drives that are to consti...

Page 60: ...D 7 and click the Assign Spare to Array button in the lower middle part of the screen NOTE You can share any given spare among several arrays You can also assign several spares to just one array or share one group of spares among several arrays In all such cases be sure that the capacity of each spare is large enough for each array that it is assigned to The capacity of a spare must be no less tha...

Page 61: ...r performance by installing the correct capacity drives in other ports before running the ACU and then selecting drives from more than one port to build the array Creating One or More Logical Drives on the Array 1 Select the Array A icon or the Unused Space icon under Array A in the Logical Configuration View window Figure 7 17 2 Click Create Logical Drive in the Array box 3 On the Create Logical ...

Page 62: ...eat steps 2 through 7 This time select RAID 1 0 as the fault tolerance method in step 3 c Save the configuration as in step 8 The main ACU screen now looks like Figure 7 18 Figure 7 18 Example configuration with two arrays NOTE The capacity shown for each logical drive is the free capacity available for data storage This value excludes the amount used for fault tolerance Expanding Array Capacity A...

Page 63: ... one expansion extension or migration at any given time There are three stages in the procedure for expanding an array 1 Back up all data on the array Although array expansion is unlikely to cause data loss observing this precaution will provide additional data protection 2 Install the new physical drives The capacity of each new drive must be no less than that of the drives that are currently in ...

Page 64: ... A to include this new drive This scenario is represented in Figure 7 19 Figure 7 19 Starting an array expansion To expand Array A and create a second logical drive on this array 1 Select Array A in the Logical Configuration View window 2 Click Expand in the Array box 3 In the left hand panel of the Expand Array A window select the unassigned 9 1 GB drive 4 Click the button in the middle of the sc...

Page 65: ...ive are saved and the capacity expansion process begins NOTE The new logical drive is not built until after the controller has finished the capacity expansion process on Array A This takes about 15 minutes per gigabyte Data can still be read from or written to any other existing logical drive on the controller although performance might be reduced However a controller can perform only one expansio...

Page 66: ...y of a logical drive 1 Back up all data on the array Although array expansion is unlikely to cause data loss observing this precaution will provide additional data protection 2 If you are extending the capacity while offline a Restart the server from the software CD provided in the controller kit b Open ACU from the CD 3 Select the logical drive in the Logical Configuration View window 4 Click Ext...

Page 67: ...pe A full stripe in the RAID 5 configuration contains 160 kbytes ten of the drives contain user data one drive contains parity data A full stripe in the RAID 1 0 configuration contains 896 kbytes The lowest common multiple of the two stripe sizes is 4480 kbytes and this figure represents the minimum amount of memory that must be available to the array accelerator To migrate to a different RAID lev...

Page 68: ... logical volume with the new fault tolerance method and stripe size that you had selected c Copy the backed up data from step 1 into the new logical volume 9 To save the new settings click Controller on the menu bar and select Save Configuration Using CPQONLIN The NetWare Online Array Configuration utility CPQONLIN lets you configure your drive arrays without shutting down your server It also indi...

Page 69: ...nfigure If no logical drives are configured for the controller the auto configuration wizard screen Figure 7 21 is displayed If logical drives are present on the controller the manual configuration screen Figure 7 22 is displayed Press the F1 key for online help at any time on either screen Automatic Configuration Figure 7 21 CPQONLIN auto configuration wizard screen 1 If the proposed logical conf...

Page 70: ...operating system To make the new logical drives available for data storage format the logical drive using the instructions given in your operating system documentation Manual Configuration Figure 7 22 Main manual configuration screen Highlight the controller array or logical drive that you want to configure and then press the Enter key The menu options for that item are shown in the panel on the r...

Page 71: ...ysical Drives Panel shows spare drives and unassigned hard drives attached to the controller New Array Panel shows physical view of new array ARRAY OPTIONS Menu Expand Array Expand Array Assign Drive Accept Changes Physical Drives Panel shows spare drives and unassigned hard drives attached to the controller New Array Panel shows physical view of new array Assign Spare Assign Spare Assign Drive Ac...

Page 72: ...New Array 3 Choose Assign Drive in the Create Array panel and then press the Enter key The highlight automatically moves to the Physical Drives panel 4 Select a drive and then press the Enter key IMPORTANT Do not assign a group of physical drives to the same array unless they are of the same capacity If the drives have different capacities the excess capacity of the larger drives cannot be used by...

Page 73: ...rives but it does not increase the fault tolerance level of any logical drives in the array For example a logical drive in a RAID 5 configuration suffers irretrievable data loss if two physical drives fail simultaneously regardless of the number of spare drives assigned Any drive that you assign as an online spare for an array operates as the spare for every fault tolerant logical drive within the...

Page 74: ...ratio for all arrays on the controller With a low priority setting a rebuild or expansion takes place only when the array controller is not busy handling normal I O requests This setting has minimal effect on normal I O operations However there is an increased risk that data will be lost if another physical drive fails while the rebuild is in progress With a high priority setting the rebuild or ex...

Page 75: ...3 Alter the settings on this screen to suit your needs 4 Press the Esc key to save the new configuration 5 Exit CPQONLIN and then restart the system to apply the changes Expanding an Array Performance may be degraded slightly during array expansion depending on the Expand Priority setting To minimize any effect expand the array during periods of low server use NOTE The expansion process takes abou...

Page 76: ...the Enter key 8 Press the Esc key to begin the array expansion You can see the progress of the expansion at any time by pressing the F3 key and then scrolling to the progress bar near the bottom of the screen Migrating RAID Level or Stripe Size Performance may be degraded slightly during migration depending on the Expand or Rebuild Priority setting To minimize any effect migrate during periods of ...

Page 77: ...me h ch7 configuring an array doc Codename SilverHammer Part Number 135606 004 Last Saved On 7 22 02 10 58 AM 6 Press the Esc key to accept the changes and begin migration You can check the progress of the migration at any time by pressing the F3 key and then scrolling to the progress bar near the bottom of the screen ...

Page 78: ... the Smart Array Controller Support Software CD are given in the leaflet provided with the CD Note that the exact procedure depends on whether the server is new or already contains the operating system and user data Using the SmartStart CD If you are setting up a new server the drivers are installed and configured at the same time that you install the operating system Refer to the documentation pr...

Page 79: ...t you are using 6 Follow the on screen instructions to create the diskettes Depending on your operating system you may need to use up to six blank diskettes Detailed instructions for installing the device drivers are given in the README files on the CSPs Updating the Compaq Insight Manager Agents If you are installing the controller as additional storage you may now update the Compaq Insight Manag...

Page 80: ...ename SilverHammer Part Number 135606 004 Last Saved On 7 22 02 11 04 AM 9 Upgrading and Replacing Options Array Accelerator To remove the existing array accelerator board 1 Squeeze the ends of the heat sink clip inwards 1 and then rotate the clip out of the heat sink 2 1 1 2 Figure 9 1 Removing the heatsink 2 Lift the heatsink out of the frame ...

Page 81: ...rd to allow room for the array accelerator board to be removed 4 Remove the plastic retainer 1 by detaching it from the array accelerator and unhooking it from the controller board 1 2 Figure 9 2 Releasing the array accelerator board 5 Swing out the DIMM ejectors 2 on each side of the array accelerator 6 Tilt the array accelerator slightly away from the controller board angle exaggerated in the fi...

Page 82: ...umber 135606 004 Last Saved On 7 22 02 11 04 AM Figure 9 3 Unplugging the array accelerator board To install the new array accelerator board 1 Push the array accelerator board firmly into the DIMM connector socket 2 Close the DIMM ejector levers to lock the array accelerator into place 3 Reinstall the plastic retainer 4 Reattach the heatsink Installation of the new array accelerator board is compl...

Page 83: ...er Do not expose to water or to temperatures higher than 60 C 140 F Do not abuse disassemble crush puncture short external contacts or dispose of in fire or water Replace only with the Compaq spare designated for this product Battery or array accelerator disposal should comply with local regulations Alternatively return these parts by established parts return methods to Compaq Computer Corporation...

Page 84: ...ber 135606 004 Last Saved On 7 22 02 11 04 AM Figure 9 5 Releasing the battery pack 3 Remove the pack from the array accelerator board If the battery pack flange grasps the board tightly rock the pack slightly from side to side while lifting the pack upward Figure 9 6 Removing the battery pack Since both packs are likely to be discharged at a similar rate repeat the procedure for the other battery...

Page 85: ...allow the battery charge monitor to reset 2 Hook the battery pack flange onto the top of the array accelerator board with the pack held at a 10 degree angle to the plane of the board Figure 9 7 Installing the new battery pack 3 Rotate the battery pack towards the array accelerator board Be sure that the clip and two pegs line up with the corresponding holes in the array accelerator board and then ...

Page 86: ...Q CONFIDENTIAL Writer John Turner File Name j ch9 upgrading and replacing options doc Codename SilverHammer Part Number 135606 004 Last Saved On 7 22 02 11 04 AM 1 2 Figure 9 8 Securing the flange and clip Installation of the new battery pack is complete Repeat for the other battery pack ...

Page 87: ...and replacing options doc Codename SilverHammer Part Number 135606 004 Last Saved On 7 22 02 11 04 AM 2 to 4 Channel Adapter Board To remove the existing 2 to 4 channel adapter board 1 Remove the screw that secures the 2 to 4 channel adapter board This screw is reachable from the back of the controller board Figure 9 9 Removing the securing screw ...

Page 88: ...placing options doc Codename SilverHammer Part Number 135606 004 Last Saved On 7 22 02 11 04 AM 2 Unplug the 2 to 4 channel adapter board from the connector on the controller board Figure 9 10 Unplugging the 2 to 4 channel adapter board 3 Pull the 2 to 4 channel adapter board out of the VHDCI socket Figure 9 11 Removing the 2 to 4 channel adapter board ...

Page 89: ... 2 to 4 channel adapter board 1 Insert the VHDCI connector on the adapter board into the unoccupied VHDCI slot 1 while sliding the adapter board under the bracket lip 2 on the occupied VHDCI slot 1 3 2 Figure 9 12 Installing the adapter board 2 Plug the adapter board into the connector 3 on the controller board 3 Secure the adapter board to the controller board by inserting and tightening the appr...

Page 90: ...COMPAQ CONFIDENTIAL Writer John Turner File Name j ch9 upgrading and replacing options doc Codename SilverHammer Part Number 135606 004 Last Saved On 7 22 02 11 04 AM Figure 9 13 Securing the adapter board to the array controller board Installation of the new adapter board is complete ...

Page 91: ... the version provided on the CD and then reboot the server This step is required for example if the controller is a Smart Array 5300 with a current firmware version less than 2 72 NOTE If the firmware on the controller is newer than that on the CD the flash utility does not replace it with the earlier firmware from the CD 6 Select Array Configuration Utility XE from the CD menu This action opens A...

Page 92: ...er Module The connector for the RAID ADG Enabler Module is located at the corner of the controller board near the array accelerator connector socket as shown in Figure 9 14 The module attaches to the controller board with the narrow tab circled in Figure 9 15 nearest to the corner of the controller board This tab can be pressed outwards during installation to allow the module to be more readily in...

Page 93: ... j ch9 upgrading and replacing options doc Codename SilverHammer Part Number 135606 004 Last Saved On 7 22 02 11 04 AM Figure 9 15 Aligning the module on the controller board When replacing a Smart Array 5300 Controller you may want to remove the RAID ADG Enabler Module from the old controller and install it onto the new controller ...

Page 94: ...move the RAID ADG Enabler Module Press the innermost plastic clip under the controller board towards the other clip 1 and push the module out of the board 2 1 2 Figure 9 16 Removing the RAID ADG Enabler Module To install the module on the new controller board 1 Check that the array accelerator on the new controller board has at least 64 MB of read write cache 2 Hold the module at an angle and inse...

Page 95: ...c Codename SilverHammer Part Number 135606 004 Last Saved On 7 22 02 11 04 AM 3 Use one thumb to press the tab at the top of the rear end outward 2a while using the other thumb to gently press the other end of the module 2b into the connector and slot on the controller board 1 2 b a Figure 9 17 Installing the module Installation of the RAID ADG Enabler Module is complete ...

Page 96: ...Frequency RF emission limits to provide an interference free radio frequency spectrum Many electronic devices including computers generate RF energy incidental to their intended function and are therefore covered by these rules These rules place computers and related peripheral devices into two classes A and B depending upon their intended installation Class A devices are those that may reasonably...

Page 97: ...rsonal expense Class B Equipment This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance wit...

Page 98: ...cause undesired operation For questions regarding your product contact us by mail or telephone Compaq Computer Corporation P O Box 692000 Mail Stop 530113 Houston Texas 77269 2000 1 800 652 6672 1 800 OK COMPAQ For continuous quality improvement calls may be recorded or monitored For questions regarding this FCC declaration contact us by mail or telephone Compaq Computer Corporation P O Box 692000...

Page 99: ...of the Canadian Interference Causing Equipment Regulations Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada Class B Equipment This Class B digital apparatus meets all requirements of the Canadian Interference Causing Equipment Regulations Cet appareil numérique de la classe B respecte toutes les exigences du Règlement sur le maté...

Page 100: ...mply with both the EMC Directive 89 336 EEC and the Low Voltage Directive 73 23 EEC issued by the Commission of the European Community Compliance with these directives implies conformity to the following European Norms the equivalent international standards are in parenthesis EN55022 CISPR 22 Electromagnetic Interference EN55024 IEC61000 4 2 3 4 5 6 8 11 Electromagnetic Immunity EN61000 3 2 IEC610...

Page 101: ...aq Smart Array 5300 Controller User Guide COMPAQ CONFIDENTIAL Writer John Turner File Name k appa Regulatory Compliance Notices doc Codename SilverHammer Part Number 135606 004 Last Saved On 7 22 02 10 57 AM Japanese Notice Taiwanese Notice ...

Page 102: ...battery outside of the controller Do not expose to water or to temperatures higher than 60 C Do not abuse disassemble crush puncture short external contacts or dispose of in fire or water Replace only with the Compaq spare designated for this product Battery or array accelerator disposal should comply with local regulations Alternatively return these parts by established parts return methods to Co...

Page 103: ...e containers Keep electrostatic sensitive parts in their containers until they arrive at static free workstations Place parts on a grounded surface before removing them from their containers Avoid touching pins leads or circuitry Always be properly grounded when touching a static sensitive component or assembly There are several methods for grounding Use one or more of the following methods when h...

Page 104: ... Part Number 135606 004 Last Saved On 7 22 02 11 03 AM Use a portable field service kit with a folding static dissipating work mat If you do not have any of the suggested equipment for proper grounding have a Compaq authorized reseller install the part NOTE For more information on static electricity or assistance with product installation contact your Compaq authorized reseller ...

Page 105: ...d 21 2 W for 5302 16 3 W at 3 3 V 4 8 W at 5 V 24 9 W for 5304 19 0 W at 3 3 V 5 9 W at 5 V PCI Bus transfer rate Up to 528 MB s SCSI Bus Number of channels 4 5304 or 2 upgradeable to 4 5302 Number of drives per channel Up to 14 Connector type 68 pin Wide internal VHDCI external Termination Required but provided on Compaq systems Transfer rate Up to 160 MB s 40 MHz per channel Temperature Range Op...

Page 106: ...formance of a single physical hard drive is adequate for home users However business users demand higher storage capacities higher data transfer rates and greater protection against data loss when drives fail Connecting extra physical drives to a system increases the total storage capacity refer to Figure D 1 but has no effect on the efficiency of read write R W operations Data can still be transf...

Page 107: ...or more virtual units called logical drives also called logical volumes Then the read write heads of all the constituent physical drives are active simultaneously reducing the total time required for data transfer L1 P1 P2 P3 Figure D 2 Physical drives configured into a logical drive L1 Because the read write heads are active simultaneously the same amount of data is written to each drive during a...

Page 108: ...ends the data blocks to the drive write heads in the correct order A natural consequence of the striping process is that each physical drive in a given logical drive will contain the same amount of data If one physical drive has a larger capacity than other physical drives in the same logical drive the extra capacity is wasted because it cannot be used by the logical drive The group of physical dr...

Page 109: ...lso extend over more than one port on the same controller but it cannot extend over more than one controller Drive failure although rare is potentially catastrophic In Figure D 4 for example failure of any physical drive causes all logical drives in the same array to fail and all data on the drives is lost To protect against data loss due to physical drive failure logical drives are configured wit...

Page 110: ...ten to the spare the logical drive will still fail When you configure an online spare it is automatically assigned to all logical drives in the same array Additionally you do not need to assign a separate online spare to each array you can configure one hard drive to be the online spare for several arrays as long as the arrays are all on the same controller Fault Tolerance Methods RAID 0 No Fault ...

Page 111: ...4 Last Saved On 7 22 02 11 02 AM RAID 1 0 Drive Mirroring In this configuration data is duplicated onto a second drive P1 P2 B1 B2 B3 B4 B1 B2 B3 B4 Figure D 5 Drive mirroring of P1 onto P2 When the array has more than two physical drives drives are mirrored in pairs S1 S2 S1 S2 P1 P5 B5 B1 B1 B5 P2 P6 B6 B2 B2 B6 P3 P7 B7 B3 B3 B7 P4 P8 B8 B4 B4 B8 Figure D 6 Mirroring with more than two physical...

Page 112: ...l drives in the array this fault tolerance method is often referred to as RAID 1 Advantages Highest read and write performance of any fault tolerant configuration No loss of data as long as none of failed drives are mirrored to another failed drive up to half of the physical drives in the array can fail Disadvantages Expensive many drives needed for fault tolerance Only 50 of total drive capacity ...

Page 113: ...S3 S4 B1 B3 P5 6 P3 4 P1 2 P7 8 B7 B2 B5 B8 B4 B6 Figure D 7 Distributed data guarding showing parity information Px y Advantages High read performance No loss of data if one physical drive fails More drive capacity usable than with RAID 1 0 parity information requires only the storage space equivalent to one physical drive Disadvantages Relatively low write performance Loss of data if a second dr...

Page 114: ...s fail As can be seen in Figure D 8 each set of parity data uses up a capacity equivalent to that of one of the constituent drives This method is most useful when data loss is unacceptable but cost must also be minimized The probability that data loss will occur when arrays are configured with RAID ADG is less than when they are configured with RAID 5 for details refer to Appendix F B1 B3 P5 6 Q7 ...

Page 115: ... Methods RAID 0 RAID 1 0 RAID 5 RAID ADG Alternative name Striping no fault tolerance Mirroring Distributed Data Guarding Advanced Data Guarding Usable drive space 100 50 67 to 93 50 to 96 Usable drive space formula n n 2 n 1 n n 2 n Minimum number of physical drives 1 2 3 4 Tolerates failure of one physical drive No Yes Yes Yes Tolerates simultaneous failure of more than one physical drive No Onl...

Page 116: ...re based RAID except that the operating system works with logical drives as if they were physical drives To protect against data loss caused by physical drive failure each logical drive must be in a different array from the others Controller Duplexing uses two identical controllers with independent identical sets of drives containing identical data In the unlikely event of a controller failure the...

Page 117: ...minate the drives Compaq servers and internal cabling provide the required termination of the SCSI bus Do not use drives of different capacity in the same array The excess capacity of larger drives cannot be used by the array and is wasted Do not use hot pluggable drives on the same SCSI bus as non hot pluggable drives Hard drives that are currently supported by Smart Array controllers are listed ...

Page 118: ...rives fail than the fault tolerance method allows fault tolerance is compromised and the logical drive fails In this case all requests from the operating system will be rejected with unrecoverable errors The Compromised Fault Tolerance section discusses possible ways to recover from this situation Recognizing Drive Failure The LEDs on the front of each hard drive are visible through the front of t...

Page 119: ...acity expansion On Off Off Do not remove the drive Removing a drive during this process may cause data loss The drive is being accessed but 1 it is not configured as part of an array 2 it is a replacement drive and rebuild has not yet started or 3 it is spinning up during POST Flashing Flashing Flashing Do not remove the drive Removing a drive during this process can cause data loss in non fault t...

Page 120: ... refer to the Compaq Servers Troubleshooting Guide Compromised Fault Tolerance Compromised fault tolerance commonly occurs when more physical drives have failed than the fault tolerance method can endure In this case the logical volume is failed and unrecoverable disk error messages are returned to the host Data loss is likely to occur An example of this situation is where one drive on an array fa...

Page 121: ...ons and restore all data from backup To minimize the risk of data loss due to compromised fault tolerance make frequent backups of all logical volumes Automatic Data Recovery Automatic data recovery is an automatic background process that rebuilds data onto a spare or replacement drive when another drive in the array fails This process is also called rebuild If a drive in a fault tolerant configur...

Page 122: ...inated or other LEDs go out the replacement drive has failed and is producing unrecoverable disk errors Remove and replace the failed replacement drive If the automatic data recovery process has abnormally terminated one possible cause is a non correctable read error on another physical drive The system may temporarily become operational if rebooted In any case locate the faulty drive replace it a...

Page 123: ...troller before automatic data recovery can begin When you set the SCSI ID jumpers manually check the ID value to be sure that the correct physical drive is being replaced Set the same ID value on the replacement drive to prevent SCSI ID conflicts CAUTION In systems using external data storage take care that the server is the first unit to be powered down and the last to be powered back up Doing th...

Page 124: ...e likelihood of fatal system errors take these precautions when removing failed drives Do not remove a degraded drive if any other member of the array is offline the Online LED is off In this condition no other drive in the array can be removed without data loss There are some exceptions When RAID 1 0 is used drives are mirrored in pairs Several drives can be in a failed condition simultaneously a...

Page 125: ...than 14 physical drives per channel No more than 32 logical volumes will be configured for a controller No drives are failed or missing The array is in its original configuration with no active spare drives Capacity expansion is not running Controller firmware is the latest version recommended If moving an array all drives in the array must be moved at the same time IMPORTANT There are some restri...

Page 126: ...A or the Array Configuration Utility refer to Chapter 7 for details Upgrading Hard Drive Capacity You can increase the storage capacity on a system by swapping drives one at a time for higher capacity drives This method is viable as long as a fault tolerance method is running and can be done even if there are no available drive bays CAUTION Since a data rebuild takes about 15 minutes per gigabyte ...

Page 127: ...g data is shown with a dashed border and the newly added drives are shown unshaded containing no data The array controller adds the new drives to the array and redistributes the original logical drives over the enlarged array one logical drive at a time Each logical drive keeps the same fault tolerance method in the enlarged array that it had in the smaller array Figure E 2 Array capacity expansio...

Page 128: ... out using one of the utilities described in Chapter 7 For reconfiguration to occur online that is without shutting down the operating system the configuration utility must be running in the same environment as the normal server applications Also online expansion is possible only in systems that are using hot pluggable drives Only ACU and ACU XE support capacity extension Also not all operating sy...

Page 129: ...ives increases it becomes increasingly unlikely that a newly failed drive is not mirrored to a previously failed drive The failure of only two physical drives is enough to cause a logical drive to fail if the two drives happen to be mirrored to each other The risk of this occurring decreases as the number of mirrored pairs in the array increases A RAID 5 logical drive with no online spare fails if...

Page 130: ...e p appf probability of logical drive failure doc Codename SilverHammer Part Number 135606 004 Last Saved On 5 23 02 9 53 AM Figure F 1 Relative probability of logical drive failure 1 6 11 16 21 26 31 36 41 46 51 56 Total number of physical drives in array Increasing likelihood of logical drive failure RAID 0 RAID 5 RAID 1 0 RAID ADG ...

Page 131: ...ntegrated SCSI controller See the cabling information in this guide 1711 Slot x drive array RAID ADG logical drives present but cache size is less than or equal to 32 MB This configuration is not recommended Migrate the logical drive or drives to RAID 5 or upgrade the array accelerator cache module 1712 Slot x drive array RAID 5 logical drives present with 56 drives or more but cache size is less ...

Page 132: ... array to improve signal integrity internal SCSI connector should be removed if external drives are attached to the same SCSI port followed by further details Follow the remaining instructions in the POST message 1724 Slot x drive array physical drive position change s detected logical drive configuration has automatically been updated Logical drive configuration has been updated automatically fol...

Page 133: ...1753 Slot x drive array array controller maximum operating temperature exceeded during previous power up This message appears at the next power up if the controller locks due to excessive temperature Check for proper operation of the server cooling fan 1754 Slot z drive array RAID ADG drive s configured but ADG Enabler Module is detached or defective Please check for detached ADG Enabler Module Ar...

Page 134: ...ler firmware 1763 Array accelerator daughtercard is detached please reattach Controller is disabled until this problem is resolved This controller model cannot operate if the array accelerator is detached Reattach the array accelerator 1764 Slot x drive array capacity expansion process is temporarily disabled followed by a cause The capacity expansion process has been temporarily disabled for the ...

Page 135: ...lot x drive array critical drive firmware problem detected please upgrade firmware on the following drive s using Options ROMPaq available from www compaq com SCSI port y SCSI ID x The indicated drives are running firmware that may cause intermittent problems Use the Options ROMPaq utility to upgrade firmware on all drives to the latest revision 1774 Slot x drive array obsolete data found in array...

Page 136: ...oling fan malfunction detected SCSI port y Overheated condition detected SCSI port y Side panel must be closed to prevent overheating SCSI port y Redundant power supply malfunction detected SCSI port y Wide SCSI transfer failed SCSI port y Interrupt signal inoperative Check SCSI cables Check the cooling fan operation by placing your hand over the fan Check the internal plenum cooling fan in tower ...

Page 137: ... message appears and drive x has not been replaced an intermittent drive failure has occurred This message also appears once immediately following drive replacement before data is restored from backup 1783 Slot x drive array controller failure If this message appears immediately following a ROM installation the ROM is either defective or not installed properly Check that the controller is firmly i...

Page 138: ...ion indicates drive positions beyond the capability of this controller This may be due to drive movement from a controller that supports more drives than the current controller 4 Configuration information indicates drives were configured on a controller with a newer firmware version 1 Turn off the system and check SCSI cable connections to be sure that drives are attached properly 2 Run the Array ...

Page 139: ...inue without starting Automatic Data Recovery The message normally appears when a drive is replaced in a fault tolerant configuration when the system is powered down In this case press the F1 key to start the automatic data recovery process A 1786 POST message will appear if the previous rebuild attempt was aborted for any reason Run the Array Diagnostics Utility ADU for more information If the re...

Page 140: ...onfigured and lose all the data on them 2 Repair the connection and press the F2 key If pressing the F2 key does not eliminate this message run the Array Diagnostics Utility ADU 3 Contact your Compaq authorized service provider 1789 Slot x drive array physical drive s not responding Check cables or replace the following SCSI drives SCSI port y SCSI ID x Select F1 to continue drive array will remai...

Page 141: ...ccelerator batteries have failed to charge and should be replaced Compaq spares 120978 001 The battery charge is below 90 Posted writes are disabled When the batteries are fully recharged the array accelerator will automatically be re enabled and this POST message will go away Replace the array accelerator or array controller if batteries do not recharge within 36 hours after powering up If the ba...

Page 142: ...y accelerator write error occurred Array accelerator is disabled Replace the array accelerator or the Smart Array controller Restore data from backup 1799 Slot x drive array drive s disabled due to array accelerator data loss Select F1 to continue with logical drives disabled Select F2 to accept data loss and re enable logical drives Data stored in the array accelerator has been lost therefore the...

Page 143: ...your system Each Smart Array 5300 Controller requires 21 2 W or 24 9 W if it has four channels Your server must be capable of supplying every controller with this amount of power Q How many internal and external drives can I install in my system A Each Smart Array 5300 Controller has two SCSI buses one internal and up to two external upgradeable to four SCSI buses two internal and up to four exter...

Page 144: ...ols Ultra3 is a SCSI protocol that uses LVD signaling Ultra2 also uses LVD signaling but earlier SCSI protocols used Single Ended SE signaling Q Are Single Ended and Low Voltage Differential SCSI compatible A Yes When mixing SE drives and LVD drives on a single SCSI channel all drives switch down to SE SCSI mode and operate under SE SCSI rules To maintain a true LVD SCSI bus with its associated pe...

Page 145: ...am connecting it to a Compaq StorageWorks Enclosure 4300 which has several hard drives Which SCSI port do I use A If you have no hard drives installed in your server you can connect the StorageWorks Enclosure 4300 to either of the available external ports SCSI connectors If your server has hard drives installed you must connect the StorageWorks Enclosure 4300 to the unused port on the controller Y...

Page 146: ...ally checks the performance of all drives on the controller normally on an hourly basis Q What is RAID ADG A RAID ADG is an extension of RAID 5 that allows additional fault tolerance by using two different and independent parity schemes Data is striped across a set of hard drives just as with RAID 5 and the two sets of parity data are calculated and written across all the drives in the array RAID ...

Page 147: ...etected ARM Auto Reliability Monitoring Also known as surface analysis A fault management feature whereby hard drives are scanned for bad sectors and data in the faulty sectors is remapped onto good sectors Parity data consistency is also checked for drives in RAID 5 or RAID ADG configurations Operates as a background process array A set of physical drives configured into one or more logical drive...

Page 148: ... extension The enlargement of a logical drive without disruption of data There must be free space on the array before extension can occur If necessary create free space by deleting a logical drive or by carrying out a capacity expansion Capacity extension can be carried out online with some operating systems controller duplexing A type of fault tolerance that requires two Smart Array controllers E...

Page 149: ...re RAID is most commonly used but there are other types of fault tolerance for example controller duplexing and software based RAID flashing Updating the flash memory on a system Flash memory is non volatile memory that is used to hold control code such as BIOS information It is also very fast because it can be rewritten block by block rather than byte by byte hot spare See online spare logical dr...

Page 150: ...ries of diagnostic tests that run automatically each time the server is started or reset RAID Redundant Array of Independent Disks A form of fault tolerance RAID 0 no fault tolerance uses data striping to distribute data evenly across all physical disks in the array but has no redundant data RAID 1 0 drive mirroring duplicates data from one drive onto a second drive RAID 5 distributed data guardin...

Page 151: ...tracking tests The self monitoring routines are customized for that specific drive type and have direct access to internal performance calibration and error measurements SmartStart An abbreviation for the Compaq SmartStart and Support Software CD A collection of software for updating system drivers configuring arrays or a system diagnosing problems with arrays or a system and updating firmware for...

Page 152: ... Codename SilverHammer Part Number 135606 004 Last Saved On 5 23 02 9 56 AM VHDCI Very High Density Cable Interconnect A type of external SCSI connector used by Ultra SCSI controllers Wide Ultra Wide Ultra2 Wide Ultra3 A set of SCSI standards that support maximum signal transfer rates of 40 MB s 80 MB s and 160 MB s respectively ...

Page 153: ...creen descriptions 7 5 sources of 7 4 stripe size migration with 7 25 using 7 4 wizard in 7 4 ACU XE 7 1 adapter board illustrated 1 3 adapter board installation of 9 8 ADG See RAID ADG ADU Array Diagnostic Utility E 4 advanced data guarding RAID ADG D 9 alert drive failure 1 9 predictive failure E 3 ARM Auto Reliability Monitoring 1 9 H 4 array adding hard drives to 7 20 E 11 creating with ACU 7 ...

Page 154: ... Wide Ultra3 SCSI H 2 batteries charge time 1 7 disposal of 9 4 A 7 lifetime of 1 7 location of illustrated 1 7 recycling of A 7 replacement of 1 7 9 4 A 7 bay assignment of hard drives H 3 block of data defined D 2 Block Sub Allocation 5 6 board components 1 2 specifications C 1 boot controller setting 6 1 boot partition 7 15 boot size changing 7 14 boot straps using B 1 C cable connectors illust...

Page 155: ...ings 3 4 system 6 1 connecting to StorageWorks Enclosure 4300 H 3 connector types illustration of 3 5 connectors location of on board 1 2 controller backward compatibility of 1 4 configuration of 7 1 dimensions of C 1 driver installation for 8 1 duplexing of D 11 installation of 2 1 3 1 interface of with server 1 8 multiple using H 1 number of supported per system H 1 performance of optimizing in ...

Page 156: ...LIN 7 32 drive status LEDs 7 8 E 2 drive termination H 2 drivers installing and updating 8 1 drives of different capacity on array 7 1 duplexing controller D 11 dynamic sector repair 1 9 E electrostatic discharge B 1 error counters E 6 error messages 1724 E 10 1785 E 10 1794 1 7 Internal Error Has Occurred 7 4 Not Configured E 10 POST table of G 1 ESD electrostatic discharge B 1 expanding an array...

Page 157: ... H hard drive failure detection of E 4 fault tolerance and D 10 general information E 1 immediate possible cause of E 7 multiple simultaneous D 10 protection against D 4 recognizing E 2 replacing drive after E 7 upon replacement possible cause E 7 hard drive status LEDs activity of when idle H 4 interpreting pattern of E 3 hard drives adding to array 7 20 E 11 assigning SCSI ID to 3 4 H 2 bay assi...

Page 158: ... per system H 1 number of logical drives allowed per array 7 2 ORCA use 7 2 spare drive capacity 7 18 stripe size 7 13 linear memory 5 6 load balancing defined D 7 location of other guides xi logical drive capacity extension description of E 11 procedure for 7 23 logical drives compared to array D 3 creation of with ACU 7 19 creation of with CPQONLIN 7 32 creation of with ORCA 7 3 defined D 2 enla...

Page 159: ... extension in using ACU 7 24 CPQONLIN and 7 26 creating volume in 5 6 linear memory in 5 6 optimizing controller performance in 5 6 partition in creating 5 6 NetWare Online Array Configuration Utility See CPQONLIN no fault tolerance RAID 0 D 5 non Compaq hard drives H 3 O offset VHDCI illustration of 3 5 online capacity extension operating systems supporting 7 24 online configuration using ACU 7 5...

Page 160: ...gainst ESD B 1 for changing RAID level 7 12 for changing stripe size 7 12 for installing controller 3 1 for setting SCSI IDs 3 4 when replacing drives E 6 E 8 predictive failure alert description of 1 9 occurence of E 3 online spare in 1 9 Pre Failure Warranty H 3 protecting data alternative methods D 11 RAID methods D 4 R RAID 0 no fault tolerance D 5 RAID 1 0 drive mirroring D 6 RAID 5 distribut...

Page 161: ...ted E 1 moving drives E 9 number of controllers per system H 1 number of hard drives per port C 1 number of hard drives per system H 1 ORCA use 7 2 replacing a Smart controller 3 4 spare drive capacity 7 18 ROM options updating 5 1 Recovery 1 10 system updating 4 1 ROM Based Setup Utility RBSU 6 1 ROMPaq Options ROMPaq 5 1 System ROMPaq 4 1 S S M A R T support 1 4 1 9 SAN Access Module support for...

Page 162: ... striping data defined D 2 summary of controller features 1 4 of fault management features 1 8 of RAID methods D 10 supported CD ROM drives H 1 hard drives features of E 1 number of hard drives per channel E 1 number of hard drives per port C 1 number of logical drives per array 7 2 operating systems 1 4 RAID methods 1 4 stripe sizes 7 13 tape drives 1 4 H 1 symbols in text x symbols on equipment ...

Page 163: ...N 7 1 7 26 NetWare array configuration utility 7 26 ORCA 6 3 7 1 POST G 1 RBSU 6 1 System Configuration Utility 5 6 System ROMPaq 4 1 V VHDCI cable 3 5 VHDCI connector on board illustration of 1 2 volume creating in NetWare 5 6 W website Compaq xii Wide Ultra2 SCSI support for 1 8 Wide Ultra3 SCSI cable part number for 3 5 distinction of from LVD H 2 drive cabling requirement of 3 5 performance of...

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