HP Microsoft Windows Server 2003 for Itanium-based Systems manual Sectors, StripeSize

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RAID

Specify the RAID level that you want for the logical drive.

•In Configure mode, the default setting is the highest RAID level that the configuration can support.

•In Reconfigure mode, the default setting is the existing RAID level for that logical drive. If you specify a different RAID setting, then ACU either ignores the new setting (in Automatic mode) or attempts to migrate the logical drive to the specified RAID level (in Custom mode).

Size

Enter the capacity that you want the logical drive to have, in megabytes. The default size setting for new logical drives is MAX. In this case, ACU creates a logical drive of the maximum possible size from the physical drives that you assigned to the array.

In Reconfigure mode, the default setting is the existing size of the logical drive. If you enter a larger value, ACU extends the logical drive to the new size if there is unused drive capacity on the same array, as long as the operating system supports logical drive extension. You cannot reduce the size of the logical drive.

CAUTION: Back up all data before extending a logical drive.

Sectors

This option specifies the number of sectors that are to comprise each track. Enter 32 to disable MaxBoot or 63 to enable it.

•For new logical drives, the default setting is 63 if the logical drive is larger than 502 GB. Otherwise, the default setting is 32.

•For an existing logical drive, the default setting is the existing setting.

Logical drive performance is likely to decrease with MaxBoot enabled.

StripeSize

This option specifies the stripe size for the logical drive in kilobytes. For RAID 0 or RAID 1 arrays, any of the stripe size values listed in the sample script can be used. For RAID 4, RAID 5, or RAID 6 (ADG) arrays, the maximum stripe size on some controllers is 64 KB. For information about the maximum supported stripe size of a particular controller, refer to the controller documentation.

If you do not specify a StripeSize value for a new logical drive, ACU uses a default value that is determined by the RAID level that you chose for the logical drive. For RAID 0 or RAID 1, the default stripe size is 128 KB, whereas for RAID 4, RAID 5, or RAID 6 (ADG) the default stripe size is 16 KB. (However, for RAID 5 on a Smart Array 6400 Series controller, the default stripe size is 64 KB.)

In Reconfigure mode, the default setting is the existing stripe size for the specified logical drive. If you specify a stripe size that is different from the existing value, then ACU attempts to migrate the logical drive to the stripe size that you specify.

CAUTION: Back up all data before extending a logical drive.

ArrayAccelerator

This option specifies whether the array accelerator is enabled or disabled for the specified logical drive. The default value is Enabled.

LogicalDriveSSPState

This option is valid only for controllers that enable SSP on a logical drive basis (at present, this applies only to the RA4x00). Other controllers that support SSP use the SSPState option ("SSPState" on page 36).

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Contents HP Array Configuration Utility User Guide Audience assumptions Contents Diagnosing array problems Getting started Features and system requirementsInstalling ACU This sectionComparison of ACU execution modes Overview for using ACUSetting the execution mode for Microsoft Windows Opening ACU in Local Application mode Choosing an operating modeOpening ACU in Browser mode Http//servername2301Opening ACU through Systems Insight Manager Select Device QueriesTypical Standard mode screen GUI operating modesTypical Configuration Wizards mode screen Completing the configuration process Typical Express Configuration mode screenPossible tasks in Standard Configuration mode Configuring a new controllerUsing Standard Configuration mode Using Express Configuration mode Click Finish Using the configuration wizardsCreating an array Click Create an array, and then click BeginConfiguring a new controller Creating a logical drive Click Create a logical drive, and then click BeginConfiguring a new controller Choices available after opening ACU Modifying an existing configurationModifying a configuration using Standard Configuration mode Clear Configuration Modifying a configuration using Express modeModifying a configuration using the Configuration wizards Click Express Configuration, and then click BeginCreate an array Controller settingsClick Controller Settings, and then click Begin Create a logical drive Delete arrays Click Delete logical drives, and then click Begin Delete logical drivesExpand Array Click Extend logical drive, and then click Begin Extend logical driveMigrate a logical drive Click Migrate a logical drive, and then click BeginRA4x00 controllers Spare managementSelective Storage Presentation Click Spare Management, and then click BeginMSA and Smart Array Cluster storage controllers Configuring switches Click ACU Switch ConfigurationSplitting a mirrored array Recombining a split, mirrored arrayModifying an existing configuration Introduction to scripting in ACU Command line syntaxScripting in ACU Operating modesSample custom input script Cpqacuxe -i FilenameScript file options Description of option categories in ACU scriptingAction Control categoryController category MethodLicenseKey, DeleteLicenseKey ClearConfigurationWithDataLossController RAIDArrayIDRebuildPriority, ExpandPriority SurfaceScanDelayArray category SSPStateDrive Logical Drive categoryOnlineSpare LogicalDriveStripeSize SizeSectors ArrayAcceleratorConnectionName Error reportingSSPAdaptersWithAccess HostModeACU scripting error messages 0-9, !, @, #, *, , , ,, -, , +, , ., /, and space. The ID Current configuration Running the CLI Using the Command Line InterfaceOverview of the ACU CLI Keyword abbreviations Command variableCLI syntax Target variableHiding warning prompts Typical proceduresExample command Querying a deviceSample scenario SyntaxExample Example commandsModifying the controller chassis name Using Selective Storage Presentation Sample scenarioModifying connection names Managing host modes connection profilesExpanding an array Deleting target devicesIdentifying devices Extending a logical driveMigrating a logical drive Target modify raid=01+0156adg? ss=8163264128256default?Managing spare drives Target modify size=#max? forcedChanging the controller cache ratio Changing the Rebuild Priority settingChanging the Expand Priority setting Enabling or disabling the drive cache Changing the surface scan delay timeRe-enabling a failed logical drive Disabling a redundant controller Setting the targetEnabling or disabling the array accelerator Typical scenarioRescanning the system = rescanProbability of logical drive failure Factors involved in logical drive failureProbability of logical drive failure Drive arrays and fault-tolerance methods Drive arraysDrive arrays and fault-tolerance methods Fault-tolerance methods Hardware-based fault-tolerance methodsDisadvantages RAID 0-No fault toleranceAdvantages RAID 1+0-drive mirroring RAID 5-distributed data guarding RAID 6 ADG-Advanced Data GuardingComparing the hardware-based RAID methods RAID RAID 6 ADGAlternative fault-tolerance methods Selecting a RAID methodServer Diagnostics Diagnosing array problemsDiagnostic tools Post messagesAcronyms and abbreviations SSP Index Index
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