ATTO Technology S-Class manual RAID Interleave Parameters, To change the RAID Interleave parameter

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6.7 RAID Interleave Parameters

The interleave size sets the amount of data to be written to each drive in a RAID Level group. This is a tunable parameter which takes a single stream of data and breaks it up to use multiple disks per I/O interval.

CAUTION

Changing this parameter causes all previous drive data on the Diamond Storage Array to be erased. Make sure you back up all information before setting up different interleave sizes.

The default sector interleave set by the QuickRAID command is 128 blocks (64k). The CLI command, RAIDInterleave, allows you to change the size of the sector interleave between RAID groups. The value depends upon the normal expected file transfer size. If the normal file transfer size is large, the interleave value should be large, and vice versa.

The value entered for the RAIDInterleave command refers to blocks of data: one block is equivalent to 512 bytes of data.

To change the RAID Interleave parameter

1Connect to Diamond Storage Array services via the RS-232 port or the optional Ethernet management services card (refer to Accessing the Array on page 17). You should now be in Command Line Interface.

2Continue with the CLI or access the RAID page of the ExpressNAV interface (refer to ATTO ExpressNAV: Browser-based Interface on page 25).

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.

RAIDInterleave options are 16, 32, 64, 128, 256 blocks and span. Span is not available for RAID Level 5.

3 In all RAID levels except RAID Level 5, type

set RAIDInterleave [163264128256 span]

For RAID Level 5 type

set RAIDInterleave [163264128256]

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.

8The array is now configured. To verify the configuration, type get RAIDInterleave.

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ATTO Technology Inc. Diamond Storage Array Installation and Operation Manual

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Contents Diamond Storage Array Class Page Page Contents In-band CLI Over the Fibre Channel Serial Port Configuration Commands Configuring Drives RAID Interleave Parameters Appendix D Specifications Vii Appendix E Warranty ViiiPreface Atto Technology, IncPage Diamond Storage Array features Diamond Storage Array Product OverviewFibre Channel model Scsi modelAdxt Powers ATA to New Levels Diamond Storage Array Technical OverviewATA Interface Engine AIE The interface to each Set up the Ethernet connection Installation InstructionsPhysical setup Connect to EthernetSet up RAID configuration Components Floor modelRack mount Components Rack mount cabinets with stationary shelf or tray Physical Set UpSpaced rail pairs in some rackmount cabinets Sliding shelf or tray type systems should neverGeneral instructions Connecting a Fibre Channel Array AutoconfigurationManual configuration Fibre Channel connections Bus speed, MB/sec Bus width Max. bus lengths Max. device Connecting a Scsi ArrayTo connect a Scsi array BitsScsi connections Logical numbering Determining Drive and Sled DesignationsPhysical numbering Numbering conventionsRAID Level 10 QuickRAID10 The QuickRAID10 ExamplesUnique serial number for each LUN RAID Level 5 QuickRAID5 with a fullyAtto ExpressNAV Accessing the ArrayCommand Line Interface RS-232 portSnmp In-band CLI Over the Fibre Channel DetailsInitiator Host Diamond Array Invalidparameterincdb will be returned Initiator/Host Diamond Storage ArraySerial Port Access Serial port access To use Telnet Ethernet Access Telnet and Snmp ProtocolsTo connect to the Ethernet port To use SnmpType SaveConfiguration restart to reboot the array Traps are generated for the following situationsOpening an ExpressNAV session Atto ExpressNAV Browser-based InterfaceBrowser compatibility Navigating ExpressNAVInformation Sidebar ExpressNAV Pages Logical Units ConfigurationClear Data RebuildCommand Line Interface Use and Guidance Command Line Interface actions and responsesPage Summary of CLI Commands Command Defaults ExampleCommand Defaults Example General Use Commands General CLI commands Ethernet Commands TelnetPassword TelnetTimeoutTelnetUsername Fibre Channel Configuration Commands FcPortName FcPortInfoFcPortList FcWWNameSerialPortHandshake Serial Port Configuration CommandsSerialPortBaudRate SerialPortEchoSerial port CLI commands Diagnostic Commands SMARTData SledFaultLEDTemperature VirtualDriveInfoMaxEnclTempAlrm Maintenance CommandsFcScsiBusyStatus MinEnclTempAlrmMaintenance CLI commands Drive Configuration Commands LUNState DriveWipeIdeTransferRate QuickRAID0RAID5ClearDataStatus RestoreModePagesRAID5ClearData RAIDInterleaveExamples, refer to Information Commands Results on Configuring Drives Jbod Just a Bunch of DisksRAID Level Interleave Hot Spare sledsEnhancing performance To set up the Jbod configuration JbodJbod RAID Level Sled-based versus disk-basedTo remove RAID Level 0 groups LUNs virtual drive numbersPage Page Type SaveConfiguration Storage Management To set up RAID Level 1 groupsType SaveConfiguration To remove RAID groupsTo set up RAID Level 1 with Hot Spare sleds Type set QuickRAID 1Configuring a fully-populated array To set up RAID Level 5 groupsTo set up one RAID Level 5 group with one Hot Spare sled Type set QuickRAID5 1 Type SaveConfiguration Restart To set up two RAID Level 5 groups with two Hot Spare sledsType set QuickRAID5 2 Type SaveConfiguration Restart LUN Type set QuickRAID5 ALL Type SaveConfiguration Restart Removing RAID groupsTo set up RAID Level 10 groups Type set QuickRAID10 0 1 2To set up RAID Level 10 with Hot Spare sleds Type set QuickRAID10 1 Type SaveConfiguration RestartRebuilding RAID Configurations Set AutoRebuild disabled saveconfiguration restart To synchronize mirrored drives manuallyRAID Interleave Parameters To change the RAID Interleave parameterRAID interleave Hardware Maintenance Maintenance Hot Swap Operating Instructions Disk drivesPower supplies To replace a blower assemblyBlower assemblies Type set QuickRAID1 Type SaveConfiguration Restart Optional Hot Spare SledTo set up two RAID Level 5 groups with Hot Spare sleds Virtual Drive Hot Spare sledsProcedure Copying DrivesCopy drives Updating firmware using the RS-232 serial port Updating FirmwareCd c\diamond\flash Type put ....imaSystem Monitoring and Reporting Power supply monitoring System fault LED and error codesNumber of blinks Troubleshooting Windows 2000 special instructions Error messagesCommand Line Interface messages Specific situations and suggestions If LUNs do not display on the host Type FirmwareRestartFactory Default Resetting DefaultsDefault To return to Default settingsCommand Default Reset if default Reset during Chosen Feature Fibre ChannelAppendix B Information Commands Results DriveInfo sled ID drive IDInfo all V80DTESCLUNInfo LUN LunInfoVirtualDriveInfo active planned Virtual Drive ID VirtualDriveInfoSafety compliances EMC specifications Radio and television interferenceRack mount dimensions Floor mount dimensionsEnvironmental and physical Manufacturer limited warranty Contact Atto Technology, Inc

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