HP Microsoft Windows Server 2003 for Itanium-based Systems manual Diagnosing array problems

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Controller category

34

Array category

36

Logical Drive category

37

Error reporting

39

ACU scripting error messages

40

Using the Command Line Interface

43

Overview of the ACU CLI

43

Running the CLI

43

CLI syntax

44

Keyword abbreviations

44

Hiding warning prompts

45

Querying a device

45

Help

45

Typical procedures

45

Creating a logical drive

46

Sample scenario

46

Modifying the controller chassis name

47

Using Selective Storage Presentation

48

Deleting target devices

50

Identifying devices

50

Expanding an array

50

Extending a logical drive

50

Managing spare drives

51

Migrating a logical drive

51

Changing the Rebuild Priority setting

52

Changing the Expand Priority setting

52

Changing the controller cache ratio

52

Changing the surface scan delay time

53

Re-enabling a failed logical drive

53

Enabling or disabling the drive cache

53

Enabling or disabling the array accelerator

54

Disabling a redundant controller

54

Setting the target

54

Rescanning the system

55

Probability of logical drive failure

56

Factors involved in logical drive failure

56

Probability of logical drive failure vs. number of drives in array

57

Drive arrays and fault-tolerance methods

58

Drive arrays

58

Fault-tolerance methods

60

Hardware-basedfault-tolerance methods

60

Alternative fault-tolerance methods

65

Diagnosing array problems

66

Diagnostic tools

66

Acronyms and abbreviations

67

Index

69

Contents 4

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Contents HP Array Configuration Utility User Guide Audience assumptions Contents Diagnosing array problems Features and system requirements Installing ACUGetting started This sectionSetting the execution mode for Microsoft Windows Overview for using ACUComparison of ACU execution modes 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 screenUsing Standard Configuration mode Configuring a new controllerPossible tasks in Standard Configuration mode Using Express Configuration mode Using the configuration wizards Creating an arrayClick Finish 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 Modifying a configuration using Standard Configuration mode Modifying an existing configurationChoices available after opening ACU Modifying a configuration using Express mode Modifying a configuration using the Configuration wizardsClear Configuration Click Express Configuration, and then click BeginClick Controller Settings, and then click Begin Controller settingsCreate an array Create a logical drive Delete arrays Expand Array Delete logical drivesClick Delete logical drives, and then click Begin Extend logical drive Migrate a logical driveClick Extend logical drive, and then click Begin Click Migrate a logical drive, and then click BeginSpare management Selective Storage PresentationRA4x00 controllers 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 Command line syntax Scripting in ACUIntroduction to scripting in ACU Operating modesSample custom input script Cpqacuxe -i FilenameScript file options Description of option categories in ACU scriptingControl category Controller categoryAction MethodClearConfigurationWithDataLoss ControllerLicenseKey, DeleteLicenseKey RAIDArrayIDSurfaceScanDelay Array categoryRebuildPriority, ExpandPriority SSPStateLogical Drive category OnlineSpareDrive LogicalDriveSize SectorsStripeSize ArrayAcceleratorError reporting SSPAdaptersWithAccessConnectionName HostModeACU scripting error messages 0-9, !, @, #, *, , , ,, -, , +, , ., /, and space. The ID Current configuration Overview of the ACU CLI Using the Command Line InterfaceRunning the CLI Command variable CLI syntaxKeyword abbreviations Target variableTypical procedures Example commandHiding warning prompts Querying a deviceSample scenario SyntaxModifying the controller chassis name Example commandsExample Using Selective Storage Presentation Sample scenarioModifying connection names Managing host modes connection profilesDeleting target devices Identifying devicesExpanding an array Extending a logical driveTarget modify raid=01+0156adg? ss=8163264128256default? Managing spare drivesMigrating a logical drive Target modify size=#max? forcedChanging the Expand Priority setting Changing the Rebuild Priority settingChanging the controller cache ratio Re-enabling a failed logical drive Changing the surface scan delay timeEnabling or disabling the drive cache Setting the target Enabling or disabling the array acceleratorDisabling a redundant controller 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 methodsAdvantages RAID 0-No fault toleranceDisadvantages 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 methodDiagnosing array problems Diagnostic toolsServer Diagnostics Post messagesAcronyms and abbreviations SSP Index Index