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Array

Basics

A-5

RAID 3

Block-level data
striping with
dedicated parity
drive

Excellent
performance for
large, sequential
data requests

Not well-suited for
transaction-
oriented network
applications; single
parity drive does
not support
multiple,
concurrent and
write requests

RAID 4
(Not
widely
used)

3 Block-level

data

striping with
dedicated parity
drive

Data striping
supports multiple
simultaneous read
requests

Write requests
suffer from same
single parity-drive
bottleneck as
RAID 3; RAID 5
offers equal data
protection and
better performance
at same cost

RAID 5

Block-level data
striping with
distributed parity

Best
cost/performance
for transaction-
oriented networks;
very high
performance and
data protection;
supports multiple
simultaneous reads
and writes; can also
be optimized for
large, sequential
requests

Write performance
is slower than
RAID 0 or RAID 1

RAID 50

Combination of
RAID 0 (data
striping) and
RAID 5 with
distributed parity

Better random
performance and
data protection
than RAID 5

Lower storage
capacity than
RAID 5

Table A-1. Comparing RAID Levels (Continued)

RAID

Level

Min No.

of Drives

Description

Strengths

Weaknesses

Содержание G5312

Страница 1: ...G and K Series External RAID Board Controller G5312 G7313 K5312 K7313 User s Guide...

Страница 2: ......

Страница 3: ...vation and without notification to its users Comments and suggestions can be sent to the address listed above Technical Support If after reviewing this user s guide you still have questions about inst...

Страница 4: ...vice complies with part 15 of the 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 receive...

Страница 5: ...s 1 4 Daughterboard G Series 1 4 Motherboard CPU Subsystem K Series 1 4 Motherboard Ultra2 SCSI Channels K Series 1 4 Motherboard Disk Cache K Series 1 5 Integrated Battery Backup and Interface K Seri...

Страница 6: ...ministrator Software Accessing the Disk Array Administrator Using the RS 232 Serial Port 3 1 Navigating the Disk Array Administrator Software 3 3 Changing the Screen Display 3 4 Disk Array Administrat...

Страница 7: ...Dedicated Spare 6 2 Deleting a Dedicated Spare 6 3 Enabling Dynamic Spares 6 3 Managing the Spare Pool 6 5 Adding a Spare to the Spare Pool 6 5 Deleting a Spare from the Spare Pool 6 6 Displaying the...

Страница 8: ...7 26 8 Managing Disk Drives and Enclosures Managing Disk Drives 8 1 Displaying Drive Information 8 2 Clearing Metadata from a Drive 8 4 Enabling and Disabling Write back Cache 8 5 Displaying Disk Cac...

Страница 9: ...nding SCSI Errors 9 9 Disk Errors 9 9 Disk Channel Errors 9 11 Voltage and Temperature Errors and Warnings 9 13 A Array Basics Array Types A 1 RAID 0 Striped Disks A 1 RAID 1 RAID 1 O Mirrored Disks A...

Страница 10: ...G and K Series User s Guide viii...

Страница 11: ...I host channel and two Ultra2 SCSI disk channels Each disk channel is a separate SCSI bus The G7313 and K7313 offer all of the features of the G5312 and K5312 except that they support Fibre Channel FC...

Страница 12: ...onfiguration store memory Motherboard Ultra2 SCSI Channels G Series Onboard Adaptec AIC 789x PCI Ultra2 SCSI interface controller ASICs All SCSI channels support Wide Ultra2 SCSI 80 MB sec Each SCSI c...

Страница 13: ...r and control interface for disk cache memory Battery Interface G Series Battery charger and battery control interface Integrated software controlled battery charger diagnostics and periodic battery m...

Страница 14: ...sure includes the following features IDT C6 C6 Winchip 200 MHz processor with internal 64 KB L1 cache and a 66 MHz 64 bit external bus 8 MB zero wait state DRAM memory independent of disk cache 2 MB n...

Страница 15: ...to PCI Bridge providing full CPU and PCI bus concurrency Disk cache size modularity using standard SDRAM 168 pin ECC DIMM 16 MB to 128 MB Battery backup switching regulator and control interface for...

Страница 16: ...panel 26 pin connector Fibre Channel Connection K Series The K7313 features a Fibre Channel connection for single loop Fibre Channel connectivity Fibre Channel Features JNI FC interface controller 64...

Страница 17: ...77 inch max Z axis height without daughterboard 1 02 inch max Z axis height single daughterboard 376 pin backplane connector receptacle Daughterboard Form factor 4 0 x 2 19 inch max PCB board 0 54 inc...

Страница 18: ...r shutdown failure 9 6 Vdc and 14 4 Vdc Table 1 3 Environmental Specifications Item Specifications Reliability MTBF Mean Time Between Failure 200 000 power on hours MTTR Mean Time To Repair 20 minutes...

Страница 19: ...o discharge at a faster rate and can take longer to take a full charge when it is returned to service A new battery or fully discharged battery can take from four to eight hours or more to fully charg...

Страница 20: ...pose I O GPIO and power Daughterboard Form factor 4 0 x 2 19 inch max PCB board 0 54 inch typical Z axis height above top surface of motherboard PCB 100 pin surface mount connectors with 0 8 mm pin pi...

Страница 21: ...s enabled during battery pack thermal warning Table 1 7 Environmental Specifications Item Specifications Reliability K5312 Main Board MTBF 200 000 hours K7313 Main and Fibre Boards MTBF 140 000 hours...

Страница 22: ...s returned to service A new battery or fully discharged battery can take from four to eight hours or more to fully charge Humidity 10 to 85 non condensing operating without battery pack 60 to 70 non c...

Страница 23: ...ingle chip Fibre Channel Data Book SCSI 2 and SCSI 3 Specification ANSI standard documents Fibre Channel Physical and Signaling Interface FC PH ANSI standard document Chaparral Documents Chaparral CAP...

Страница 24: ...G and K Series User s Guide 1 14...

Страница 25: ...n arbitrated loop or SAN with fabric RS 232 serial port for configuration and management of the controller Connecting to the SCSI Port You can connect the controller G5312 and K5312 to a SCSI port Ref...

Страница 26: ...he RS 232 port to update the firmware configure and monitor the controller using a VT 100 ANSI computer with a terminal emulator Refer to your enclosure documentation for information about the correct...

Страница 27: ...is turned off 2 Using a straight through serial cable connect one end of the cable to the serial port on the enclosure 3 Connect the other end of the serial cable to the serial port on the computer t...

Страница 28: ...G and K Series User s Guide 2 4...

Страница 29: ...Drives and Enclosures You can access the Disk Array Administrator software using the RS 232 serial port connection on the controller You must connect a computer with terminal emulator software such a...

Страница 30: ...e sure that your terminal emulation software is set to use the correct COM port on your computer See Terminal Emulator and COM Port Problems on page 9 1 for more details on how the controller can auto...

Страница 31: ...gating the Disk Array Administrator Software You can navigate the Disk Array Administrator software using your keyboard Table 3 1 below describes the primary navigation and selection methods Table 3 1...

Страница 32: ...e Figure 3 1 on page 3 5 and Figure 3 2 on page 3 6 describe the complete Disk Array Administrator menu hierarchy In the Disk Array Administrator menu options that are not accessible appear gray For e...

Страница 33: ...Accessing the Disk Array Administrator Software 3 5 Figure 3 1 Menu tree...

Страница 34: ...G and K Series User s Guide 3 6 Figure 3 2 Menu tree continued...

Страница 35: ...see page 4 15 Reconstruct an array see page 4 17 Expand array capacity see page 4 18 Change the array Logical Unit Number LUN see page 4 21 Change the array name see page 4 22 Trust an array see page...

Страница 36: ...system does not support multiple LUNs the host will only be able to see one array To create an array 1 From the System Menu select Add an Array and press Enter The Enter Array Name screen displays 2...

Страница 37: ...but it is not visible to the host system until you reboot the controller Note Most Unix Linux and Macintosh operating systems require the controller LUN be a higher value than all array LUNs Before cr...

Страница 38: ...ID5 RAID50 VOLUME a single drive similar to just a bunch of disks JBOD except that it includes metadata or MIRRORED and press Enter Note A RAID 10 array is created when there are more than two drives...

Страница 39: ...el number Drive firmware revision Drive state 6 Select the drives you want to use for the array and press Enter You select a drive by highlighting it and pressing Enter Each selected drive turns gray...

Страница 40: ...an array and are not assigned as a dedicated or pool spares display You can delete a dedicated spare from the array at any time For more information see Deleting a Dedicated Spare on page 6 3 You sele...

Страница 41: ...AID 0 and RAID 1 are the fastest array size drive speed and other processes running on the controller You can press Esc to return the Disk Array Administrator menus and perform other functions To chec...

Страница 42: ...24 Viewing Array Status You can view the status of an array including the following information State Online Offline Critical or Fault tolerant Name The name given to the array RAID RAID type 0 3 4 5...

Страница 43: ...the array was created Utility Utility running None Verify Reconstruct Expand or Initialize To view the status of an array 1 From the System Menu select Array Menu and press Enter The Select Array scr...

Страница 44: ...host write requests directed to the array SecRd Total number of sectors read from the array SecWt Total number of sectors written to the array Queue Depth Current number of commands from the host that...

Страница 45: ...r The Array Menu screen displays 3 Select Array Statistics and press Enter The statistics menu screen displays 4 Select View Statistics and press Enter The statistics screen displays showing the stati...

Страница 46: ...you change how you are using the array Note You cannot reset the queue depth value It always reflects the current I O queue depth To reset array statistics 1 From the System Menu select Array Menu an...

Страница 47: ...MB Status If part of an array this displays the array name and member number If a spare this displays the type of spare If unused displays Available If drive was part of an array that no longer exists...

Страница 48: ...other array configuration you can stop the array initialization process After you stop the process the array is marked as offline and cannot be used You must delete the array before you can use the d...

Страница 49: ...any bad parity Mirrored Compares the primary and secondary drives If a mismatch occurs the primary is copied to the secondary You may want to verify an array when you suspect there is a problem To ver...

Страница 50: ...em Menu The status of the verification displays in the list of arrays Viewing Verification Status You can view the status of the verification process while it is running To view verification status 1...

Страница 51: ...elect Abort Verify and press Enter The system confirms that you want to stop the verification process 5 Select Yes and press Enter Reconstructing an Array The controller automatically reconstructs red...

Страница 52: ...tion size How you create a new partition or resize an existing one depends upon the operating system Most operating systems cannot resize an existing partition Refer to your operating system documenta...

Страница 53: ...with a list of existing arrays 2 Select the array you want and press Enter The Array Menu screen displays 3 Select Expand Function and press Enter The expand menu displays 4 Select Start Expand and p...

Страница 54: ...eviously the system automatically begins the expansion To skip a drive use the or keys Expansion begins and the percentage completed displays To return to the Array Menu press Esc To check the progres...

Страница 55: ...t the new LUN Note You cannot change the array s LUN to one that is already in use If you want to use a LUN that is already in use you must first reassign the LUN in use For more information about LUN...

Страница 56: ...t to make the change 5 Select Yes and press Enter Trusting an Array You can use the Trust Array function to bring an array back online by resynchronizing the time and date stamp and any other metadata...

Страница 57: ...nd press Enter The option is only enabled until you use it After you trust an array the option reverts back to being disabled 5 Press Esc twice to return to the System Menu 6 Select Array Menu and pre...

Страница 58: ...ch drive Note You cannot delete an array while any utility Initialize Verify Expand or Reconstruct is running on the array You must stop the utility if allowed or let it finish before you can delete t...

Страница 59: ...page 4 13 Power On Self Test POST see Problems During Bootup on page 9 4 Overall Statistics screen see Displaying Overall Statistics on page 5 11 Displaying the Event Log The controller s event log c...

Страница 60: ...sages may let you resolve the problem without calling You should also check Chapter 9 Troubleshooting You can view the event information three ways Most recent event One event at a time most recent ev...

Страница 61: ...er The Event Log Menu screen displays 2 Select View Event Log and press Enter The Event Log screen displays the last event that occurred 3 Press to see the previous event You can continue to view earl...

Страница 62: ...2 Press u to page up or d to page down in the log 3 Keep pressing CTRL E to page through the other information screens and return to the menu Capturing the Event Log File You can also capture the ent...

Страница 63: ...ay the controller s hardware and configuration information This is where you can see what version of the firmware you have Chaparral technical support personnel may request this information You can di...

Страница 64: ...r None if the FC link is not active AL_PA G7313 and K7313 only Currently assigned value or None if the FC link is not active Loop ID G7313 and K7313 only SOFT or a specific number as set in the Disk A...

Страница 65: ...ftware 1 is default and recommended value Utility Pri HIGH MED or LOW utility priority as set in Disk Array Administrator software Alarm Mute ON or OFF as set in Disk Array Administrator software Batt...

Страница 66: ...Menu and press Enter The Utilities Menu screen displays SEP Poll Rate Number of seconds as set in the Disk Array Administrator software Temperature ON or OFF as set in Disk Array Administrator softwar...

Страница 67: ...Monitoring System Status 5 9 2 Select Hardware Information and press Enter The Hardware Information screen displays 3 Press Esc to return to the Utilities Menu...

Страница 68: ...strator software press CTRL E The first screen of events from the event log displays 2 Press CTRL E again The Hardware Information screen displays 3 Press CTRL E again You can press Esc to return to t...

Страница 69: ...Total current command queue depth across all LUNs Host read write histogram that shows how many host reads and writes fell into a particular size range The I O ranges are based on powers of two 1 Sect...

Страница 70: ...enu select Utilities Menu and press Enter The Utilities Menu screen displays 2 Select Overall Statistics and press Enter The Overall Statistics screen displays 3 Select View Statistics and press Enter...

Страница 71: ...ect Utilities Menu and press Enter The Utilities Menu screen displays 2 Select Overall Statistics and press Enter The Overall Statistics screen displays 3 Select View R W Histogram and press Enter The...

Страница 72: ...vidual array See Viewing Array Statistics on page 4 10 To reset overall statistics 1 From the System Menu select Utilities Menu and press Enter The Utilities Menu screen displays 2 Select Overall Stat...

Страница 73: ...can the bus find the new disk drive and automatically start reconstruction of the array See page 6 3 The controller looks for a dedicated spare first If it does not find a properly sized dedicated spa...

Страница 74: ...cated spare drives to an array For more information about assigning spares when you create an array see Creating Arrays on page 4 1 Note A spare cannot be added that does not have enough capacity to r...

Страница 75: ...ails you can replace the drive and the controller will rescan the bus find the new disk drive and automatically start reconstruction of the array The controller automatically finds the new drive and r...

Страница 76: ...ing is marked with an next to it 4 Select Enabled and press Enter The Rescan Rate screen displays 5 Enter the rescan rate in minutes This tells the controller how often it should look for an available...

Страница 77: ...a pool spare is too small smaller than an individual member in an array the controller cannot use it Adding a Spare to the Spare Pool You can add up to eight drives to the spare pool to reconstruct an...

Страница 78: ...he Spare Pool You can delete a spare from the spare pool at any time To delete a spare from the spare pool 1 From the System Menu select Pool Spare Menu and press Enter The Pool Spare Menu screen disp...

Страница 79: ...display the spare pool 1 From the System Menu select Pool Spare Menu and press Enter The Pool Spare Menu screen displays 2 Select Display Pool Spares and press Enter The Display Pool Spare screen dis...

Страница 80: ...G and K Series User s Guide 6 8...

Страница 81: ...see page 7 18 Lock the cache setting see page 7 20 Enable or disable the battery see page 7 21 Change the I O priority see page 7 22 Rescan all channels see page 7 23 Pause I O see page 7 24 Restore t...

Страница 82: ...system confirms that it has shut down 3 Press Enter to reboot The system performs its self test When you see the Disk Array Administrator initial screen the controller is ready See Chapter 3 Accessing...

Страница 83: ...em confirms that you want to make the change 5 Select Yes and press Enter to make the changes The system confirms that the changes are made 6 Press Esc to return to the Configuration Menu To set the c...

Страница 84: ...s that the changes are made 6 Press Esc to return to the Configuration Menu Changing the Controller s LUN and SCSI Target ID or Fibre Channel Loop ID You can change the SCSI target ID or the Fibre Cha...

Страница 85: ...o be seen at LUN 0 SEP LUNs Allow access to SEPs A SEP LUN may be set to a value of 0 7 SOFT see the controller LUN description for the meaning of SOFT or NONE NONE means that the SEP cannot be access...

Страница 86: ...u power down and power up The Disk Array Administrator software cannot tell you which Loop IDs are available To be sure that you have successfully assigned the Loop ID you want check the Loop ID after...

Страница 87: ...ct Host Configuration and press Enter The Host Configuration screen displays 3 Select Target ID and press Enter The Target ID screen displays 4 Select the option or number you want to use and press En...

Страница 88: ...hannel at all times Select the Loop ID you want to use and press Enter This can be any number from 0 to 125 To Do this Not assign the controller a LUN Select NONE and press Enter Let the controller de...

Страница 89: ...MB sec maximum This Ultra SCSI setting only affects the device channel Host SCSI channel rates are controlled by setting the host adapter SCSI ID assigned to each channel initiator ID The controller a...

Страница 90: ...ed with an next to it 4 Select the setting you want and press Enter The initiator ID screen displays showing the current initiator ID 5 Select the initiator ID you want and press Enter The system conf...

Страница 91: ...ant to set up Your SAN administrator should know the WWNs for your network You can display a list of all WWNs that the controller is aware of on the SAN and you can give each WWN a name alias of your...

Страница 92: ...s the information even after you reboot the controller You can determine which WWN is for which server by booting one server at a time and then viewing the WWN list The most recently booted server is...

Страница 93: ...nown to the controller The WWNs are listed according the when they were booted The most recently booted server host is listed first Note A hosts WWN can be placed at the top of the known hosts list wh...

Страница 94: ...re stored on the controller so if you change controllers you have to rename the servers To create or change names for WWNs 1 From the System Menu select Configuration Menu and press Enter The Configur...

Страница 95: ...N zoning This is where you determine which servers can access each array LUN You set up LUN zoning by either excluding or including servers on a list for each array LUN The list can include or exclude...

Страница 96: ...and added one or more WWNs to an include or exclude list Add Host to List Displays the Enter Host WWN screen where you enter the WWN or name alias or select the server you want to add to the current...

Страница 97: ...splay add or remove servers from the list Exclude Listed Hosts Lets you enter or select the WWNs or names aliases of the specific servers hosts you do not want to be able to access the selected array...

Страница 98: ...m and reboot the controller If the problem is not resolved it will shut down again Alarm conditions trigger an event message that displays in the Disk Array Administrator software window and in the ev...

Страница 99: ...s Enter VCC voltage Warning 5V 3 5 and 6 5 Shutdown 5V 6 5 and 10 Check the Disk Array Administrator software to confirm what the alarm means See Chapter 3 Accessing the Disk Array Administrator Softw...

Страница 100: ...nabled the host cannot modify the cache setting The default setting is disabled This option is useful in some environments where the host system disables the controller s write back cache resulting in...

Страница 101: ...enabled Note You should only disable the battery if you are running the controller with an uninterruptable power supply UPS so that you will not lose power to the controller If you disable the batter...

Страница 102: ...run when there are active I O operations competing for the controller s CPU The choices are High default Medium Low For example select High if your highest priority is to get the array back to a full...

Страница 103: ...escanning All Channels You can tell the controller to scan all disk channels for new or removed disk drives You can use this option when you install or remove drives The Rescan temporarily pauses all...

Страница 104: ...while SCSI bus activity continues others do not Refer to your enclosure documentation Caution Pausing I O halts active I O to the host Note If you are not sure that your enclosure supports hot swappi...

Страница 105: ...ting system time out may occur the time varies according to the operating system For example in Windows NT the default limitation during I O activity is 10 seconds Restoring Default Settings You can r...

Страница 106: ...ite www chaparralnet com and click on Support Contact Chaparral technical support for firmware updates at 303 845 3200 or e mail to Support chaparralnet com Upgrading the Controller s Firmware You use...

Страница 107: ...3 From the System Menu select Shutdown Restart and press Enter The system confirms that you want to shut down 4 Select Yes and press Enter The system confirms that it has shut down 5 Press Enter to re...

Страница 108: ...gate to where the firmware update file is located select it and click Open Select the same Protocol from the drop down list as you selected from the Flash Utility screen Click Send The file transfers...

Страница 109: ...sable write back cache and display cache status see page 8 5 Enable disable changes to SMART see page 8 8 Blink a drive LED see page 8 9 Take down a drive see page 8 10 Test a drive see page 8 11 For...

Страница 110: ...e revision If any of the drives are members of an array the following information may also display Utility running Expand Verify etc Array number this array s sequential position in the controller s a...

Страница 111: ...rmation Drive number This drive s sequential position in the controller s drive list Drive status Whether the drive is up or down Channel number Back end disk bus number Target ID Size Size of the dri...

Страница 112: ...or arrow keys to scroll through the drives These are the drives that are currently members of the array 4 Press Esc to return to the Array Menu Clearing Metadata from a Drive All of the member drives...

Страница 113: ...LE DISABLE or DON T MODIFY which means the controller should not change any drive s write back cache settings The default setting is DON T MODIFY Typically if your drives are part of an array you do n...

Страница 114: ...lays 3 Select Write back Cache and press Enter The Write back Cache screen displays The current setting is marked with an next to it 4 Select the option you want and press Enter 5 Reboot or rescan to...

Страница 115: ...f the drives are not on a UPS and power is lost during disk writes the array will lose any data in the disk s write back cache To display disk cache status 1 From the System Menu select Utilities Menu...

Страница 116: ...nnected to the controller This can be set to ENABLE DISABLE or DON T MODIFY which means the controller should not change any drive s SMART settings The default setting is DON T MODIFY On most drives S...

Страница 117: ...anning All Channels on page 7 23 Blinking a Drive LED You can blink the LED on a specific drive The drive continues blinking its LED until you do one of the following Press Esc before the Disk Array A...

Страница 118: ...l drives in the array To make the drive display again you must use Rescan See Rescanning All Channels on page 7 23 After you rescan you must clear the metadata from the drive before you can use it in...

Страница 119: ...re message displays 5 Press Esc to return to the Drive Utilities Menu Managing SAF TE Enclosures A SEP SAF TE Environmental Processor is a SCSI device from which the RAID controller can inquire about...

Страница 120: ...g from zero that does not already have a hard that is a numeric LUN assignment NONE means that the SEP cannot be accessed via a LUN Note that if both a controller LUN and a SEP LUN are set to SOFT the...

Страница 121: ...elect the LUN of the SEP you want and press Enter The SEP LUN screen displays 5 Select the option or number you want to use To Do this Not assign the SEP a LUN Select NONE and press Enter Let the cont...

Страница 122: ...Slot update status Slot Flags This controls whether the controller sends commands to the SEP to update the status of each enclosure slot The default setting is ON which means that the controller does...

Страница 123: ...Enclosures 8 15 3 Select SEP Settings and press Enter The Poll Rate screen displays 4 Enter the poll rate you want in seconds and press Enter The Temperature screen displays The current setting is ma...

Страница 124: ...ether you want the SEP to send slot status updates to the controller and press Enter The Global Flags screen displays The current setting is marked with an next to it 7 Select whether you want the SEP...

Страница 125: ...Follow these steps if you set your terminal emulator to this rate and still get garbage characters 1 If you are able shut down the controller See Rebooting the Controller on page 7 1 If you are not a...

Страница 126: ...blem Screen is updated and menus appear right but boxes around menus look incorrect Try a different font in your terminal emulator program such as Terminal If you cannot find a font that looks correct...

Страница 127: ...Configuration Menu and press Enter The Configuration Menu displays 2 Select Backoff Percent and press Enter The Backoff Percent screen displays 3 Enter the backoff percent you want to use and press E...

Страница 128: ...equires the driver parameter LUN_ENABLE FF in startup ncf to scan for all LUN s Check the driver documentation for your host SCSI channel You may also need to compact the LUN mapping Device SCSI Chann...

Страница 129: ...ted 2 Verify that there are not any SCSI address conflicts 3 Check the enclosure to make sure everything is properly connected 4 If the enclosure and the drive work properly replace the controller Pro...

Страница 130: ...ery error Verify that the 3 cell NiMH battery pack is being used The battery packs from other Chaparral external RAID controllers such as the G6322 are not compatible You will not damage the battery p...

Страница 131: ...Add a spare to the array or to the spare pool Then replace the bad drives See Adding a Dedicated Spare on page 6 2 or Adding a Spare to the Spare Pool on page 6 5 DRIVE DOWN An error occurred with th...

Страница 132: ...ry backed up data and the arrays assigned to this data are not present Either determine which drives are missing and reinstall them or select Yes when asked if you want to discard this data SDRAM CORR...

Страница 133: ...about viewing the event log see Displaying the Event Log on page 5 1 Disk Errors If a disk detects an error it reports the error which is recorded in the event log The figure below shows an example o...

Страница 134: ...the SCSI Primary Commands 2 SPC 2 Specification for a complete list of ASC and ASCQ descriptions Table 9 3 Sense key descriptions Sense Key Description 0h No sense 1h Recovered error 2h Not ready 3h M...

Страница 135: ...rs are displayed as hexadecimal codes 11 01 Read retries exhausted 11 02 Error too long to correct 11 03 Multiple read errors 11 04 Unrecovered read error auto reallocate failed 11 0B Unrecovered read...

Страница 136: ...Selection timeout displayed as Sel Timeout 21 Controller detected an unrecoverable protocol error on the part of the target 22 Unexpected bus free condition displayed as Unex Bsfree 23 Parity error on...

Страница 137: ...ded to abort I O request for reasons other than bus or target reset 45 I O request was aborted because of target reset requested by controller 46 Target did not respond properly to abort sequence 4B I...

Страница 138: ...G and K Series User s Guide 9 14...

Страница 139: ...ual disk has advantages in fault tolerance cost performance or a combination of these This section explains the different array types and the disk requirements for each type Array Types Array types ar...

Страница 140: ...ecause both disks in a pair must fail for the array to fail In an array with five pairs of mirrored disks for example the array can maintain its integrity even if five disks fail as long as each pair...

Страница 141: ...d user data on the remaining disks Two disks must fail before the entire array fails The read performance of a RAID 5 array is excellent comparable to that of a RAID 0 array Write performance is lower...

Страница 142: ...ring RAID Levels Table A 1 illustrates the differences between the different RAID levels Table A 1 Comparing RAID Levels RAID Level Min No of Drives Description Strengths Weaknesses RAID 0 2 Data stri...

Страница 143: ...neck as RAID 3 RAID 5 offers equal data protection and better performance at same cost RAID 5 3 Block level data striping with distributed parity Best cost performance for transaction oriented network...

Страница 144: ...ent RAID Controller Channels The G5312 and K5312 RAID controllers have two device channels 1 and 2 the G7313 and K7313 have three device channels 0 1 and 2 An array can consist of disks on different c...

Страница 145: ...uting interconnect various N_Ports or NL_Ports Depending on vendor support fabric switches may be interconnected to support up to 16 million N_Ports on a single network Fibre Fibre is a generic FC ter...

Страница 146: ...FC 0 layer This layer consists of the physical characteristics of the media and interface including drivers transceivers connectors and cables A GBIC attaches to an FC adapter and connects a router t...

Страница 147: ...table indexed by sequential LUN values The values indicate select bus target LUN devices Mapping tables are used by some routers to perform FC to SCSI operations by default Point to Point A point to...

Страница 148: ...e Network Management Protocol SNMP SNMP is the Internet standard protocol defined in STD 15 RFC 1157 developed to manage nodes on a Internet Protocol IP network Speed Speed is a status type in the FC...

Страница 149: ...ology A network topology refers to the physical layout of nodes on a network Topologies range from local network topologies to WAN topologies FC topologies include point to point FC AL and fabric Trap...

Страница 150: ...G and K Series User s Guide G 6...

Страница 151: ...back online 4 22 changing LUNs of 4 21 changing names of 4 22 controlling access to 7 15 creating 4 1 deleting 4 24 expanding capacity of 4 18 LUNs for 7 5 mixing disks A 6 reconstructing 4 17 6 1 res...

Страница 152: ...port 2 1 to the RS 232 port 2 2 Controller LUN for 7 5 controller changing FC Loop ID for 7 6 changing LUN 7 6 changing target ID 7 6 changing the sample rate 7 17 changing utility priority 7 22 confi...

Страница 153: ...status of 4 13 Display Drive Cache 8 7 Display Drives screen 8 3 Display Host List 7 13 7 16 Display Host List screen 7 13 Display Pool Spares 6 7 displaying array status 4 8 cache status for disk dri...

Страница 154: ...sts 7 17 Exclude Listed Hosts 7 17 Expand Function 4 19 4 21 Expand Status screen 4 21 expanding array capacity 4 18 status of 4 20 F FC Loop ID changing for controller 7 6 FC port connecting to 2 1 F...

Страница 155: ...rboard 1 2 1 3 1 4 muting the controller alarm 7 18 N names changing for arrays 4 22 creating for WWNs 7 14 navigating in the Disk Array Administrator software 3 3 New LUN screen 4 21 New Sample Rate...

Страница 156: ...for SCSI channels 7 9 SEP Configuration screen 8 12 8 14 SEP LUNs screen 8 13 SEPs changing LUNs for 8 12 changing the enclosure status setting 8 14 changing the polling interval 8 14 changing the slo...

Страница 157: ...ort 9 1 Temperature screen 8 15 temperature status setting changing for enclosures 8 14 temperature alarm thresholds for 7 18 terminal screen problems 9 2 terminal emulator software 3 1 terminal scree...

Страница 158: ...histogram 5 11 status for drives 8 7 voltage alarm thresholds for 7 18 volume sets A 4 W warning events 9 7 World Wide Names naming 7 14 viewing known 7 12 write back cache disabling for disk drives...

Страница 159: ......

Страница 160: ...7420 E Dry Creek Parkway Longmont CO 80503 2000 Chaparral Network Storage Inc All rights reserved Chaparral and Chaparral logo are trademarks of Chaparral Network Storage Inc Printed in the U S 11 00...

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