ATTO Technology VT-Class manual Configuring the Diamond-VT, RAID Level, Virtual Tape Volumes

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7.0 Configuring the Diamond-VT

The Diamond-VT can be configured as RAID Level 10 or RAID Level 5 with zones and/or Hot Spare sleds. Partitions are created automatically during configuration of Virtual Tape emulation. The default is a single zone which includes all LUNs (devices), all ports and all hosts. RAID is a storage configuration which uses multiple disk drives to increase capacity, performance and/or reliability.

You may configure your Diamond-VT in several different ways depending on your needs although the Diamond-VT makes some choices for you.

The following elements must be considered when you are configuring your Diamond-VT:

•RAID level

•Interleave

•Number of tape volumes

•Number of tape drives

•Hot Spare sled option

•Zoning

other end to make sure the transmission has not had any errors.

In the Diamond-VT, transmitted data with the added parity data is striped across disk drives. A hardware XOR engine computes parity, thus alleviating software processing during reads and writes.

The Diamond-VT will operate in degraded mode if a drive fails unless you have Hot Spare sleds enabled (see below).

Using the ExpressNAV browser-based interface is the easiest way to set up your Diamond-VT. You may also use the Command Line Interface commands.

CAUTION

Changing these parameters causes all previous drive data on the Diamond-VT to be erased. Make sure you back up all information before setting up a different configuration.

RAID Level 10

RAID Level 10 (mirroring with striping) increases data transfer rates while ensuring security by writing the exact same data simultaneously to two or more different drives. RAID Level 10 is used in applications requiring high performance and redundancy.

RAID Level 5

RAID Level 5 increases reliability while using fewer disks than mirroring by using parity redundancy. Distributed parity on multiple drives provides the redundancy to rebuild a failed drive from the remaining good drives. Parity data is added to the transmitted data at one end of the transaction, then the parity data is checked at the

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Virtual Tape Volumes

When the Diamond-VT is configured as a Virtual Tape, it is divided into several tape volumes and tape drives based on your choice and the RAID level you choose. See Virtual Tape on page 49.

Hot Spare sleds

In most configurations, if a member of a virtual device becomes degraded, you must swap out the faulted sled as defined in Hot Swap Operating Instructions on page 69. If you have not enabled AutoRebuild, you must also start a manual rebuild.

However, you may designate Hot Spare sleds as replacements for faulted sleds without intervention by you or a host. These sleds, once designated as Hot Spares, are not available for other use.

See Optional Hot Spare Sled on page 50 for more

information.

Zones

Zoning is a collection of related Diamond capabilities supporting flexible Diamond-VT configuration management configurable via CLI commands in the Command Line Interface or the

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 PagesMaintenance Services Commands Fibre Channel Configuration CommandsSerial Port Configuration Commands Diagnostic CommandsDrive Management Commands ECCResetting Defaults Configuring the Diamond-VTDiagnostics, Upgrade and Maintenance Troubleshooting Virtual TapeAppendix F Product Safety Xiii Appendix D Sample Zoning Command SequencesAppendix E Specifications Xii Appendix G Part numbers Xiv Appendix H WarrantyDisclaimer PrefaceAtto Technology, Inc Page Diamond-VT features Diamond Storage Array-VT Product OverviewFibre Channel model Scsi modelEthernet Diamond-VT Technical OverviewRS-232 400MB/secAdxt Powers ATA to New Levels ATA Interface Engine AIE The interface to eachSet up the Ethernet connection Installation InstructionsPhysical setup Connect to EthernetConnect to Ethernet, on page 5, follow Set up Virtual Tape configurationConfiguration examples 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 Bus speed, MB/sec Bus width Max. bus lengths Max. device Connecting a Scsi ArrayTo connect the Scsi Diamond-VT BitsScsi connections Atto ExpressNAV Accessing the Diamond-VTCommand Line Interface RS-232 portSnmp Details In-band CLI Over Fibre ChannelInitiator Host Diamond-VT Initiator/Host Diamond-VT Serial Port Access Serial port access To use Telnet Ethernet Access Telnet and Snmp ProtocolsTo connect to the Ethernet port To use SnmpTraps are generated for the following situations Navigating ExpressNAV Atto ExpressNAV Browser-based InterfaceBrowser compatibility Reset button Parameter name Submit buttonExpressNAV Pages Logical Units Tape VolumesConfiguration 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 TelnetTimeout SNMPUpdatesTelnetPassword SNMPTrapsFibre Channel Configuration Commands FcScsiBusyStatus FcPortListFcPortName FcWWNameSerialPortHandshake Serial Port Configuration CommandsSerialPortBaudRate SerialPortEchoMaintenance Services Commands Diagnostic Commands TapeVolumeInfo PowerAudibleAlarmSledFaultLED RAID5ClearDataStatusDrive Management Commands IdeTransferRate DriveWipeLUNState IdeWriteCacheRAIDHaltRebuild RAID5ClearDataRAIDInterleave RAIDManualRebuildRebuildPriority RestoreModePagesTapeVolumeBlockSize TapeWriteProtectZoneDelete ZoneClearAllZoneCreate ZoneRemoveDeviceCLI configure drives RAID Level Configuring the Diamond-VTVirtual Tape Volumes Hot Spare sledsInterleave Enhancing performanceVirtual Tape To set up RAID Level 10 with Hot Spare sleds Optional Hot Spare SledPrinciples of Zoning Planned configuration is a work-in-processZones Device portion defines the LUNsStatus and Sense Data Factors to considerType ZoneInfo To remove zones Configuring ZoningTo create a zone 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 ....imaRS-232 Monitoring Port and CLI One tool to Diagnostics, Upgrade and MaintenancePower On Self Test Post Each time 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 Command Line Interface messages TroubleshootingWindows 2000 special instructions Error Messages Specific situations and suggestionsIf you cannot read or write to the Diamond-VT If a power supply failsIf you can’t access the Diamond-VT CLI via Ethernet Type FirmwareRestart in CLIDefault Resetting DefaultsFactory Default 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 SAN technology Appendix a GlossaryFibre Channel technology Scsi protocolAppendix Appendix B ATA Disk Technology FeatureFibre Channel Appendix C LunInfo for a Jbod setup LunInfo PartitionInfo active 59TapeVolumeInfo ZoneInfoViii Simple configuration Appendix D Sample Zoning Command SequencesFirst time configuration after download Symmetric ModelZoneAddPort zone1 ZoneCreate zone2 Asymmetric ModelZoneClearAll ZoneCreate zone1 ZoneAddPort zone2 ZoneCreate zone3Combined Symmetric/Asymmetric Model Floor Mount Dimensions Appendix E SpecificationsRack Mount Dimensions Environmental and physicalEMC specifications Appendix F Product SafetySafety compliances Radio and television interferenceAppendix G Part numbers Description All modelsManufacturer limited warranty Appendix H WarrantyContact Atto Technology, Inc
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