HP XP24000, XP20000 manual When the Path Mode is Single Mode

Page 23

Figure 9 When the Path Mode is Single Mode

•When the path mode is Single mode and there is at least one alternate path in the Standby status

Figure 10 (page 24) shows an example of when the path mode is Single mode, and there are alternate paths in Normal status and Standby status. Figure 11 (page 25) shows another example of when the path mode is Single mode. For Figure 11 (page 25), there are alternate paths in Standby status only.

When an error occurs in the path that is being used for I/Os, the I/O execution path is switched to the path with the second highest priority in Normal status (see Figure 10 (page 24)). If there is no path in Normal status other than the path that is being used for I/Os, the status of the path in Standby status is automatically changed to Normal, and the I/O execution path is switched to that path (see Figure 11 (page 25)).

As you restore the path with the highest priority, note that only when the external storage system is an EVA storage system, the I/O execution path is switched back to the restored highest priority path. In this case, the status of the path for which the status was changed to Normal when the error occurred changes back to Standby.

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Contents Abstract Fourth January Edition Date Description First JuneSecond September Third NovemberContents Performing XP External Storage Operations Using the XP External Storage GUIPreparing for XP External Storage Operations 101 Remote Command Devices 119Support and Other Resources 132 Troubleshooting 126Connecting External Storage Systems 134 Required Volume Capacity for Each Emulation Type 152 Glossary 167 Index 169 XP External Storage Overview of HP StorageWorks XP External Storage SoftwareXP External Storage Unifying Copy Operations between Different Storage SystemsOverview of HP StorageWorks XP External Storage Software Page About XP External Storage Operations Connecting External Storage SystemsAbout XP External Storage Operations XP External Storage Components XP External Storage ComponentsStorage Systems and Cross-subsystem Paths Volumes and Mapping PathsXP External Storage Operations XP External Storage OperationsChoosing the External Port Configuring XP External StorageChoosing and Mapping External Volumes Configuring XP External Storage Registering a Volume to an External Volume Group ExGConfiguring External Volume Attributes Clpr Cross-subsystem PathsPath Mode Example of Alternate Path Setting Examples of Switching I/O Execution Paths to Alternate Paths When the Path Mode is Multi Mode When the Path Mode is Single Mode Single Mode with Alternate Paths in Normal and Standby Single Mode with Alternate Paths in Standby Only Connecting Mainframe VolumesDifference between Automatic Mapping and Manual Mapping Connecting Open Systems VolumesPort Discovery and Volume Discovery Choosing Mapping PolicyUsing a Mapped External Volume from a Connected Host Using a Mapped External Volume from a Connected HostStoring New Data in the Mapped External Volume Storing the New Data in the Mapped External Volume Using Existing Data in the Mapped External VolumeInteroperability with other Products and Functions LUN Manager and Configuration File LoaderInteroperability with other Products and Functions LUN Expansion LusePerformance Monitor and XP Auto LUN XP Continuous Access and Hitachi TrueCopy for MainframeVirtual LVI/LUN VLL Cache Residency ManagerSnmp Agent Examples of Using External Volumes with Other ProductsHP StorageWorks XP Snapshot Software HP StorageWorks XP Thin Provisioning SoftwareExample of the XP Auto LUN Operations XP Continuous Access OperationsExamples of Using External Volumes with Other Products XP Continuous Access Journal OperationsExample of the XP Continuous Access Journal Operations Example of the XP Business Copy Operations XP Business Copy OperationsExample of the XP Snapshot Operations XP Snapshot OperationsXP External Storage Requirements Preparing for XP External Storage OperationsSystem Requirements Storage Systems Supported as External Storage SystemsXP External Storage Requirements Guidelines for XP External Storage OperationsMapping Guidelines Database Yes When the Emulation Type of the External Volume is for OpenRecommended Applications According to HDD Type Application HDD Type FC/SSD 1Database Not Recommended Capacity GuidelinesApplication HDD Type Volume Attribute Guidelines Guidelines for Mainframe VolumesCreating Luse Volume Guidelines AMS 2000 Series Guidelines Maintenance Guidelines for an External Storage SystemPerformance and Status Guidelines RAID Level ConsiderationsUninstalling XP External Storage Installing and Uninstalling XP External StorageInstalling XP External Storage Starting XP External Storage Starting XP External StorageUsing the XP External Storage GUI Using the XP External Storage GUIVolume Operation Window Volume Operation Window To Status EnableStatus Enable The status is displayed To update the all items in the window including the ExtVolume Operation Tree and List Pop-up Menu for the Volume Operation Tree Volume Operation TreeFor the Add Volume VolumeSubsystem Add Volume Auto + Product name Executed the volumeStatus of the External Volume in Ext. VOL Status Volume Operation List When Path Group is ClickedPath Mode Assigned to each volume in the external volume groupWhen the external volumes are mapped Regardless of the Cache Mode settingCross-subsystem Paths List Details Cross-subsystem Paths dialog box. This dialog box Preview Dialog BoxIdentification number of the port in the external storage SystemPath Operation Window Console main window Not show the status when you open the Path OperationChanging the tree display. The information displayed Selected in the tree. For details, seePath Operation Tree and List Path Operation Tree Path Operation List When Subsystem is ClickedStatus of the Cross-subsystem Path Displayed in the Status Path Operation List When Port or WWN is Clicked Path Operation List When Product Name is ClickedPort Operation Window Port Operation WindowPort External port in the local storage system WWN indicating the target port in the external storagePreview dialog box, see Preview Dialog Box Selected in the treeSelected in the tree. Sort the list by clicking the column HeadingsPort Information List Port Operation TreeNumber of Ports Detailed information on the PCB mode, see the HPPerforming XP External Storage Operations Overview of Setting OperationsOverview of Setting Operations Performing XP External Storage Operations Setting Port of External Storage SystemMapping an External Volume Automatically Setting Port Attribute for Local Storage SystemMapping an External Volume Manually Mapping an External Volume Manually Add Volume Dialog Box Add Volume Dialog BoxLdev Mapping Manual Pop-up menu Description Set External Volume ParameterLdev Mapping Auto Can specify the Ldev number to the first LdevSet External Volume Parameter Dialog Box Set External Volume Parameter Dialog BoxLdev Mapping Auto Dialog Box Ldev Mapping Auto Dialog BoxLdev Mapping Manual Dialog Box Ldev Mapping Manual Dialog Box Ssid Dialog BoxSsid Example How to Map LDEVs Manually Example How to Map LDEVs AutomaticallyExample of Ldev Mapping Manual Dialog Box Setting the Cross-subsystem PathsConfigure Cross-subsystem Paths Dialog Box Configure Cross-subsystem Paths Dialog BoxPort Discovery Dialog Box Lower Priority Configuring the Cross-subsystem PathSelected Paths Delete Allows you to delete the selected Raise PriorityPop-up Menu of Configure Cross-subsystem Paths Dialog Box Changing the Configured Cross-subsystem Path PriorityChanging the Cross-subsystem Path Canceling the Cross-subsystem Path ConfigurationPerforming XP External Storage Operations Ldev Information Dialog Box Checking the External Volume DetailsChecking the External Volume Details Displayed Item Description Normal Mapping path is normal Mapping Path Information Dialog BoxProcessing has timed out Target errorDisplayed Item FoundTurning On or Off the Storage System Check Paths & Restore Volume commandTurning On or Off the Storage System Turning On or Off Only the External Storage SystemTurning On or Off Only the Local Storage System Turning On or Off Both Storage Systems If the External Volume is Used in this way Operations Required before Disconnecting External VolumesDisconnecting All External Volumes Disconnect Subsystem Resuming All External Volumes Check Paths & Restore Volume Performing XP External Storage Operations Restoring the Paths to the External Volume Check Paths Restoring the Paths to the External Volume Check PathsChanging the Cache Mode Setting of the External Volume Changing the Inflow Control Setting of the External Volume Change WWN Parameter Dialog Box Changing the Port Setting of the External Storage SystemChanging the Port Setting of the External Storage System Edit Policy Dialog Box Performing Maintenance for External SubsystemEditing Mapping Policy Deleting the External Volume Mapping Delete Volume Command Deleting the External Volume Mapping Delete Volume CommandPerforming XP External Storage Operations Introduction Using Spreadsheets for XP External Storage OperationsIntroduction Available Types and Operation Tags Before Using SpreadsheetsContents of a Spreadsheet Ssid Tag Saving Storage System InformationExternalGroup Tag MappedVolume TagInformation Saved when the Ssid Tag is Written Information Saved when the ExternalGroup Tag is WrittenWWN of the external storage system Information Saved when the MappedVolume Tag is WrittenLU number of the external volume LayerAddVolumeSetting Tag Mapping External VolumesAddVolumeSetting Tag Parameters Alternate path Digits WWNOr fewer Assigned to any Volume. AnRange Parameter Setting Range of ValuesCapacity Ldev in blocks For details, see Ssid assigned to To FffeWhen Creating Multiple LDEVs in an External Volume AddVolumeSetting2 TagAddVolumeSetting2 Tag Parameters Ldkc number 00 to Parameter Setting RangeAssigned to any Volume However, an ValuesDisconnectVolume Tag Parameters Changing Path Group Deleting the External Volume Mapping DeleteVolume TagCheckPath-RestoreVolume Tag Parameters DeleteVolume Tag ParametersStructure and Identifier of Parameters DividePathGroup Tag UnitePathGroup TagExample of a Spreadsheet Example of a SpreadsheetStructure and Identifier of Parameters UnitePathGroup Tag Number LessExample Overview of Remote Command Devices Remote Command DevicesOverview of Remote Command Devices Remote Command Devices Guidelines for Remote Command DevicesUniversal Storage Platform VM Guidelines for Remote Command DevicesUniversal Storage Platform Maximum capacity Mapping a Command Device as a Remote Command DeviceRestrictions on Remote Command Device RestrictionPage Procedure to Use Initiator/External MIX Mode Restrictions on Initiator/External MIX Mode Error TroubleshootingTroubleshooting for XP External Storage General Troubleshooting for XP External StorageBlockade External port is blocked Action Troubleshooting the Mapping PathMapping Path Statuses and Required Actions Status Description UnknownReduced Changed the volume capacity wasAccess the device of the external To access the device of the externalBeen stopped by timeout Setting of the topology doesConnected through switches, Internal errorSystem becomes inaccessible Troubleshooting Volume DiscoveryCauses of Volume Discovery Failure and Required Actions Status Description Device check errorCalling HP Technical Support Calling HP Technical SupportHP Technical Support Support and Other ResourcesRelated Documentation Conventions for Storage Capacity ValuesDocumentation Feedback Subscription ServiceSubscription Service HP WebsitesSystem Parameters AMS/WMS Connecting External Storage SystemsAMS/WMS Storage System System ParametersWMS Window Names Parameters Parameter SettingsStorage System Displayed Serial Number Model Path Status and Examples of the Recovery Procedure AMS/WMS P9500 Disk Array Path status and examples of recovery procedurePath Status and Examples of the Recovery Procedure AMS/WMS Thunder 9500V Storage System System Parameters Thunder Relationship between the WWN of the Port and Controller Path Status and Examples of the Recovery ProcedureUSP V/VM Storage System Path Status and Examples of the Recovery Procedure ThunderChannel port properly using LUN Manager Disable the host group securitySecurity Path Status and Examples of the Recovery Procedure USP V/VMVolume operation again TagmaStore USP/NSC Storage SystemLightning 9900V Storage System Lightning 9900V Storage SystemLightning 9900 Storage System Path Status and Examples of the Recovery Procedure LightningSVS200 Storage System SVS200 Storage SystemHP StorageWorks EVA Storage System Identifying Logical Volumes Using Characteristic2Path Status and Examples of the Recovery Procedure SVS200 System Parameters for Connecting an EVA Storage SystemBehavior of the Alternate Path System Parameter Connecting Sun StorEdge 6120/6320Sun StorEdge 6120/6320 Sun StorageTek FlexLineSystem Parameter Sun StorageTek Sun StorageTekEMC CLARiiON CX Series System Parameter Sun StorageTek FlexLineEMC Symmetrix Series System Option modeRestrictions for Connecting an EMC CLARiiON CX Series ProcedureIBM DS3000/DS4000/DS5000 Series System Parameter for Connecting IBM SVC SeriesSGI IS4600 Series System Parameter for Connecting Fujitsu FibreCAT CX SeriesFujitsu FibreCAT CX Series Non-HP Storage SystemsRequired Volume Capacity for Each Emulation Type Required Volume Capacity for Each Emulation TypeDetermining Required External Volume Capacity Maximum Usable Capacity of an External VolumeCapacity List for Each Emulation Type Capacity List for Each Emulation TypeLdev Capacity Information for Each Emulation Type Volume Capacity Information for Each Emulation Type Adjusting the Volume Capacities for Pairs Adjusting the Volume Capacities for Pairs157 ExPath Tool Preparing for Using the ExPath ToolExPath Tool Overview of the ExPath ToolUsing the ExPath Tool Using the ExPath ToolInstalling the ExPath Tool Uninstalling the ExPath ToolEditing the Java Security Policy Creating an Authentication FileCreating a Command File Running the ExPath Tool Command Purpose Svpip Command ReferenceSvpip Command Command List for the ExPath ToolDisconnect Command Login CommandCheckstatus Command Checkpath CommandExternal Volume Status Normal Destage Disconnect Checking External Volume Status Normal Destage Disconnect Checking 167 GlossaryGlossary SVP169 XP Continuous Access or XP Continuous Access JournalIndex Index
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