ATTO Technology VT-Class manual Rebuilding RAID Level 5 and 10 Configurations

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Browser-based Interface

9.3 Rebuilding RAID Level 5 and 10 Configurations

If a sled must be removed and a new sled inserted into the Diamond Storage Array while it is configured in a RAID Level 5 or 10, you must rebuild the RAID Level using CLI commands or the ExpressNAV interface.

WARNING

Note

Selecting RAID parameters causes all previous drive data on the Diamond Storage Array to be erased. Make sure all of your information is backed up before setting up RAID groups.

When you initially set up RAID groups using the QuickRAID command, groups are synchronized automatically because there is no pre-existing data on the drives. However, drives may display as “degraded, and you need to set all LUNs to OK status.

The simplest method to check RAID group status is to access the RAID page of the ExpressNAV interface. See ATTO ExpressNAV: Browser-based Interface on page 23.

Note

Because the ExpressNAV pages take you through this process easily, the following instructions are based on the CLI commands. Use these instructions as a guide in ExpressNAV.

To reset LUN status

1Display the status of the array by typing RAIDRebuildStatus.

2Set the sleds which are listed as degraded to a rebuild state of OK by entering

set RAIDRebuildState [sled number] OK

Virtual Tape synchronization

The most efficient method to synchronize Virtual Tape configurations is to enable Hot Spares or the Auto Rebuild feature.

To synchronize mirrored drives automatically

If mirrored drives are removed for more than 15 to 30 seconds and then re-inserted or replaced, the replaced drives are labeled “degraded” when you check the Array’s status by typing RAIDRebuildStatus. If you enable AutoRebuild. the array rebuilds the degraded drives automatically when a new drive is inserted.

Drive rebuilding reduces performance. You may want to leave AutoRebuild at the default disabled and manually rebuild during off-peak hours, or use the RebuildPriority command described below.

1Connect to Diamond Storage Array services via the RS-232 port or the optional Ethernet management services card (see Accessing the Diamond-VTon page 15). You should now be in the CLI.

2Continue with the CLI or access the RAID page of the ExpressNAV interface (see ATTO ExpressNAV:

on page 23).

3Type AutoRebuild enabled.

4Information displays on the screen while the array updates NVRAM ending with a Ready*.

5Type SaveConfiguration.

6Type FirmwareRestart to reboot the array.

7Reboot the host computer connected via Fibre Channel or SCSI to the array.

8To verify the configuration, type

RAIDRebuildStatus

9If a rebuild is necessary, the array will automatically rebuild drives.

Rebuild priority

Drive rebuilding reduces performance. Use the RebuildPriority command through the CLI or on the RAID page of the ExpressNAV interface to customize when your rebuilds will occur.Choices are High, Low and Same.

•If you select High priority, rebuild I/O requests are implemented before system I/O requests.

•If you select Low priority, rebuild I/O requests execute only when there are no pending I/O requests.

•If you select Same priority, rebuild I/O and system I/O receive equal consideration.

You must use a SaveConfiguration Restart command to implement the rebuild priority command.

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ATTO Technology Inc. Diamond Storage Array Installation and Operation Manual

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Contents Diamond Storage Array VT-Class Page Page Contents Atto ExpressNAV Browser-based Interface ExpressNAV PagesFibre Channel Configuration Commands Serial Port Configuration CommandsMaintenance Services Commands Diagnostic CommandsDrive Management Commands ECCConfiguring the Diamond-VT Diagnostics, Upgrade and Maintenance TroubleshootingResetting Defaults Virtual TapeAppendix D Sample Zoning Command Sequences Appendix E Specifications XiiAppendix F Product Safety Xiii Appendix G Part numbers Xiv Appendix H WarrantyDisclaimer PrefaceAtto Technology, Inc Page Diamond-VT features Diamond Storage Array-VT Product OverviewFibre Channel model Scsi modelDiamond-VT Technical Overview RS-232Ethernet 400MB/secAdxt Powers ATA to New Levels ATA Interface Engine AIE The interface to eachInstallation Instructions Physical setupSet up the Ethernet connection Connect to EthernetSet up Virtual Tape configuration Configuration examplesConnect to Ethernet, on page 5, follow RAID Level 10 with Hot Spare sledsDiamond-VT Components Floor modelRack mount model Floor Model Diamond-VT Physical SetupRack Mount Physical setup Autoconfiguration Connecting a Fibre Channel ArrayManual configuration Fibre Channel connections Connecting a Scsi Array To connect the Scsi Diamond-VTBus speed, MB/sec Bus width Max. bus lengths Max. device BitsScsi connections Accessing the Diamond-VT Command Line InterfaceAtto ExpressNAV RS-232 portSnmp Details In-band CLI Over Fibre ChannelInitiator Host Diamond-VT Initiator/Host Diamond-VT Serial Port Access Serial port access Ethernet Access Telnet and Snmp Protocols To connect to the Ethernet portTo use Telnet To use SnmpTraps are generated for the following situations Navigating ExpressNAV Atto ExpressNAV Browser-based InterfaceBrowser compatibility Reset button Parameter name Submit buttonExpressNAV Pages Tape Volumes ConfigurationLogical Units PartitionsSaveConfiguration command CLI Interface via ASCII-based CommandsReady Return type/mode Return format/content HostnameSummary of CLI Commands Command Defaults ExampleCLI index Zoneaddhost zone1 General Use Commands Ethernet Commands SNMPUpdates TelnetPasswordTelnetTimeout SNMPTrapsFibre Channel Configuration Commands FcPortList FcPortNameFcScsiBusyStatus FcWWNameSerial Port Configuration Commands SerialPortBaudRateSerialPortHandshake SerialPortEchoMaintenance Services Commands Diagnostic Commands PowerAudibleAlarm SledFaultLEDTapeVolumeInfo RAID5ClearDataStatusDrive Management Commands DriveWipe LUNStateIdeTransferRate IdeWriteCacheRAID5ClearData RAIDInterleaveRAIDHaltRebuild RAIDManualRebuildRestoreModePages TapeVolumeBlockSizeRebuildPriority TapeWriteProtectZoneClearAll ZoneCreateZoneDelete ZoneRemoveDeviceCLI configure drives Configuring the Diamond-VT Virtual Tape VolumesRAID Level Hot Spare sledsInterleave Enhancing performanceVirtual Tape To set up RAID Level 10 with Hot Spare sleds Optional Hot Spare SledPlanned configuration is a work-in-process ZonesPrinciples of Zoning Device portion defines the LUNsStatus and Sense Data Factors to considerType ZoneInfo Configuring Zoning To create a zoneTo remove zones To change current zonesErrors Zone definition tables The Zone commandsUpdating firmware via the RS-232 serial port Updating FirmwareUpdating firmware via the optional Ethernet card Cd c\diamond\flash Type put ....imaDiagnostics, Upgrade and Maintenance Power On Self Test Post Each timeRS-232 Monitoring Port and CLI One tool to Ethernet Monitoring Port and CLI If the optionalSystem Fault LED and Error Codes If a serious Power Supply Monitoring The Diamond-VT25C 32C 35C 40C Disk Drive Activity and Disk Fault LEDs Each Monitoring, reporting Troubleshooting Windows 2000 special instructions Error MessagesCommand Line Interface messages Specific situations and suggestionsIf a power supply fails If you can’t access the Diamond-VT CLI via EthernetIf you cannot read or write to the Diamond-VT Type FirmwareRestart in CLIResetting Defaults Factory DefaultDefault Return to Default settingsCommand Default Rebuilding RAID Level 5 and 10 Configurations To synchronize mirrored drives manually Hardware Maintenance Hardware maintenance Hot Swap Operating Instructions Disk DrivesTo replace a blower assembly Power SuppliesBlower Assemblies Appendix a Glossary Fibre Channel technologySAN technology Scsi protocolAppendix Appendix B ATA Disk Technology FeatureFibre Channel Appendix C LunInfo for a Jbod setup LunInfo PartitionInfo active 59TapeVolumeInfo ZoneInfoViii Appendix D Sample Zoning Command Sequences First time configuration after downloadSimple configuration Symmetric ModelAsymmetric Model ZoneClearAll ZoneCreate zone1ZoneAddPort zone1 ZoneCreate zone2 ZoneAddPort zone2 ZoneCreate zone3Combined Symmetric/Asymmetric Model Appendix E Specifications Rack Mount DimensionsFloor Mount Dimensions Environmental and physicalAppendix F Product Safety Safety compliancesEMC specifications Radio and television interferenceAppendix G Part numbers Description All modelsManufacturer limited warranty Appendix H WarrantyContact Atto Technology, Inc
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