HP Microsoft Windows Server 2003 for Itanium-based Systems manual Splitting a mirrored array

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The screen now displays a URL for launching the Switch Configuration Utility. This utility is a Java™ applet that enables you to further configure the switch. You might need to load the most current Java™ plug-in to be able to use the applet.

6.Click the URL link.

7.Follow the on-screen prompts and instructions to use the switch configuration utility.

Splitting a mirrored array

This task splits an array that consists of one or more RAID 1+0 logical drives into two identical new arrays consisting of RAID 0 logical drives. This feature is useful when you want to replicate a configuration or when you want to build a backup before performing a risky operation.

IMPORTANT: You cannot split an array if it contains logical drives in RAID 0, RAID 5, or RAID ADG configurations.

NOTE: An array can be split or re-mirrored only when the server is offline and operating in the Standard configuration mode of the ACU GUI.

1.Take the server offline.

2.Insert the CD that contains ACU into the CD-ROM drive.

3.Open ACU, and stay in Standard configuration mode (the default).

4.Select the controller that contains the array that you want to split.

5.In the Configuration View panel, select the array.

6.In the Select a Task panel, click Split Mirrored Array.

7.Click OK.

8.When ACU has finished splitting the array, remove the physical drives that constitute one of the new arrays.

IMPORTANT: If you do not remove one of the arrays, the server will be unable to distinguish between the two new arrays after it is restarted (next step) because the arrays are identical in all respects.

9.Restart the server.

Recombining a split, mirrored array

NOTE: An array can be split or re-mirrored only when the server is offline and operating in the Standard configuration mode of the ACU GUI.

1.Take the server offline.

2.Insert the drives that contain the other half of the split array.

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Contents HP Array Configuration Utility User Guide Audience assumptions Contents Diagnosing array problems Installing ACU Features and system requirementsGetting started This sectionComparison of ACU execution modes Overview for using ACUSetting the execution mode for Microsoft Windows Choosing an operating mode Opening ACU in Local Application modeHttp//servername2301 Opening ACU in Browser modeSelect Device Queries Opening ACU through Systems Insight ManagerGUI operating modes Typical Standard mode screenTypical Configuration Wizards mode screen Typical Express Configuration mode screen Completing the configuration processPossible tasks in Standard Configuration mode Configuring a new controllerUsing Standard Configuration mode Using Express Configuration mode Creating an array Using the configuration wizardsClick Finish Click Create an array, and then click BeginConfiguring a new controller Click Create a logical drive, and then click Begin Creating a logical driveConfiguring a new controller Choices available after opening ACU Modifying an existing configurationModifying a configuration using Standard Configuration mode Modifying a configuration using the Configuration wizards Modifying a configuration using Express modeClear Configuration 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 Migrate a logical drive Extend logical driveClick Extend logical drive, and then click Begin Click Migrate a logical drive, and then click BeginSelective Storage Presentation Spare managementRA4x00 controllers Click Spare Management, and then click BeginMSA and Smart Array Cluster storage controllers Click ACU Switch Configuration Configuring switchesRecombining a split, mirrored array Splitting a mirrored arrayModifying an existing configuration Scripting in ACU Command line syntaxIntroduction to scripting in ACU Operating modesCpqacuxe -i Filename Sample custom input scriptDescription of option categories in ACU scripting Script file optionsController category Control categoryAction MethodController ClearConfigurationWithDataLossLicenseKey, DeleteLicenseKey RAIDArrayIDArray category SurfaceScanDelayRebuildPriority, ExpandPriority SSPStateOnlineSpare Logical Drive categoryDrive LogicalDriveSectors SizeStripeSize ArrayAcceleratorSSPAdaptersWithAccess Error reportingConnectionName HostModeACU scripting error messages 0-9, !, @, #, *, , , ,, -, , +, , ., /, and space. The ID Current configuration Running the CLI Using the Command Line InterfaceOverview of the ACU CLI CLI syntax Command variableKeyword abbreviations Target variableExample command Typical proceduresHiding warning prompts Querying a deviceSyntax Sample scenarioExample Example commandsModifying the controller chassis name Sample scenario Using Selective Storage PresentationManaging host modes connection profiles Modifying connection namesIdentifying devices Deleting target devicesExpanding an array Extending a logical driveManaging spare drives Target modify raid=01+0156adg? ss=8163264128256default?Migrating a logical drive 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 Enabling or disabling the array accelerator Setting the targetDisabling a redundant controller Typical scenario= rescan Rescanning the systemFactors involved in logical drive failure Probability of logical drive failureProbability of logical drive failure Drive arrays Drive arrays and fault-tolerance methodsDrive arrays and fault-tolerance methods Hardware-based fault-tolerance methods Fault-tolerance methodsDisadvantages RAID 0-No fault toleranceAdvantages RAID 1+0-drive mirroring RAID 6 ADG-Advanced Data Guarding RAID 5-distributed data guardingRAID RAID 6 ADG Comparing the hardware-based RAID methodsSelecting a RAID method Alternative fault-tolerance methodsDiagnostic tools Diagnosing array problemsServer Diagnostics Post messagesAcronyms and abbreviations SSP Index Index