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

Page 22

Figure 8 When the Path Mode is Multi Mode

•When the path mode is Single mode

Figure 9 (page 23) shows an example of when the path mode is Single mode. 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.

As you restore the path with the priority higher than the currently used path, the I/O execution path is automatically switched to the restored path that has the highest priority.

22 About XP External Storage Operations

Image 22

Contents Abstract Third November Edition Date Description First JuneSecond September Fourth JanuaryContents Preparing for XP External Storage Operations Using the XP External Storage GUIPerforming XP External Storage Operations Remote Command Devices 119 101Connecting External Storage Systems 134 Troubleshooting 126Support and Other Resources 132 Required Volume Capacity for Each Emulation Type 152 Glossary 167 Index 169 Unifying Copy Operations between Different Storage Systems Overview of HP StorageWorks XP External Storage SoftwareXP External Storage XP External StorageOverview 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 ComponentsVolumes and Mapping Paths Storage Systems and Cross-subsystem PathsXP External Storage Operations XP External Storage OperationsChoosing and Mapping External Volumes Configuring XP External StorageChoosing the External Port Configuring External Volume Attributes Registering a Volume to an External Volume Group ExGConfiguring XP External Storage Cross-subsystem Paths ClprPath 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 Connecting Mainframe Volumes Single Mode with Alternate Paths in Standby OnlyChoosing Mapping Policy Connecting Open Systems VolumesPort Discovery and Volume Discovery Difference between Automatic Mapping and Manual MappingStoring New Data in the Mapped External Volume Using a Mapped External Volume from a Connected HostUsing a Mapped External Volume from a Connected Host Using Existing Data in the Mapped External Volume Storing the New Data in the Mapped External VolumeLUN Expansion Luse LUN Manager and Configuration File LoaderInteroperability with other Products and Functions Interoperability with other Products and FunctionsCache Residency Manager XP Continuous Access and Hitachi TrueCopy for MainframeVirtual LVI/LUN VLL Performance Monitor and XP Auto LUNHP StorageWorks XP Thin Provisioning Software Examples of Using External Volumes with Other ProductsHP StorageWorks XP Snapshot Software Snmp AgentXP Continuous Access Operations Example of the XP Auto LUN OperationsXP Continuous Access Journal Operations Examples of Using External Volumes with Other ProductsExample of the XP Continuous Access Journal Operations XP Business Copy Operations Example of the XP Business Copy OperationsXP Snapshot Operations Example of the XP Snapshot OperationsStorage Systems Supported as External Storage Systems Preparing for XP External Storage OperationsSystem Requirements XP External Storage RequirementsMapping Guidelines Guidelines for XP External Storage OperationsXP External Storage Requirements Application HDD Type FC/SSD 1 When the Emulation Type of the External Volume is for OpenRecommended Applications According to HDD Type Database YesApplication HDD Type Capacity GuidelinesDatabase Not Recommended Guidelines for Mainframe Volumes Volume Attribute GuidelinesCreating Luse Volume Guidelines RAID Level Considerations Maintenance Guidelines for an External Storage SystemPerformance and Status Guidelines AMS 2000 Series GuidelinesInstalling XP External Storage Installing and Uninstalling XP External StorageUninstalling XP External Storage Starting XP External Storage Starting XP External StorageVolume Operation Window Using the XP External Storage GUIUsing the XP External Storage GUI To update the all items in the window including the Ext To Status EnableStatus Enable The status is displayed Volume Operation WindowVolume Operation Tree and List Volume Operation Tree Pop-up Menu for the Volume Operation TreeExecuted the volume VolumeSubsystem Add Volume Auto + Product name For the Add VolumeVolume Operation List When Path Group is Clicked Status of the External Volume in Ext. VOL StatusRegardless of the Cache Mode setting Assigned to each volume in the external volume groupWhen the external volumes are mapped Path ModeCross-subsystem Paths List Details System Preview Dialog BoxIdentification number of the port in the external storage Cross-subsystem Paths dialog box. This dialog boxPath Operation Window Selected in the tree. For details, see Not show the status when you open the Path OperationChanging the tree display. The information displayed Console main windowPath Operation Tree and List Path Operation List When Subsystem is Clicked Path Operation TreeStatus of the Cross-subsystem Path Displayed in the Status Path Operation List When Product Name is Clicked Path Operation List When Port or WWN is ClickedWWN indicating the target port in the external storage Port Operation WindowPort External port in the local storage system Port Operation WindowHeadings Selected in the treeSelected in the tree. Sort the list by clicking the column Preview dialog box, see Preview Dialog BoxPort Operation Tree Port Information ListDetailed information on the PCB mode, see the HP Number of PortsOverview of Setting Operations Overview of Setting OperationsPerforming XP External Storage Operations Setting Port of External Storage System Performing XP External Storage OperationsSetting Port Attribute for Local Storage System Mapping an External Volume AutomaticallyMapping an External Volume Manually Mapping an External Volume Manually Add Volume Dialog Box Add Volume Dialog BoxCan specify the Ldev number to the first Ldev Pop-up menu Description Set External Volume ParameterLdev Mapping Auto Ldev Mapping ManualSet External Volume Parameter Dialog Box Set External Volume Parameter Dialog BoxLdev Mapping Auto Dialog Box Ldev Mapping Auto Dialog BoxLdev Mapping Manual Dialog Box Ssid Dialog Box Ldev Mapping Manual Dialog BoxSsid Example How to Map LDEVs Automatically Example How to Map LDEVs ManuallySetting the Cross-subsystem Paths Example of Ldev Mapping Manual Dialog BoxConfigure Cross-subsystem Paths Dialog Box Configure Cross-subsystem Paths Dialog BoxPort Discovery Dialog Box Raise Priority Configuring the Cross-subsystem PathSelected Paths Delete Allows you to delete the selected Lower PriorityChanging the Configured Cross-subsystem Path Priority Pop-up Menu of Configure Cross-subsystem Paths Dialog BoxCanceling the Cross-subsystem Path Configuration Changing the Cross-subsystem PathPerforming XP External Storage Operations Checking the External Volume Details Checking the External Volume DetailsLdev Information Dialog Box Mapping Path Information Dialog Box Displayed Item Description Normal Mapping path is normalFound Target errorDisplayed Item Processing has timed outCheck Paths & Restore Volume command Turning On or Off the Storage SystemTurning On or Off Only the Local Storage System Turning On or Off Only the External Storage SystemTurning On or Off the Storage System Turning On or Off Both Storage Systems Operations Required before Disconnecting External Volumes If the External Volume is Used in this wayDisconnecting All External Volumes Disconnect Subsystem Resuming All External Volumes Check Paths & Restore Volume Performing XP External Storage Operations Changing the Cache Mode Setting of the External Volume Restoring the Paths to the External Volume Check PathsRestoring the Paths to the External Volume Check Paths Changing the Inflow Control Setting of the External Volume Changing the Port Setting of the External Storage System Changing the Port Setting of the External Storage SystemChange WWN Parameter Dialog Box Editing Mapping Policy Performing Maintenance for External SubsystemEdit Policy Dialog Box 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 Contents of a Spreadsheet Before Using SpreadsheetsAvailable Types and Operation Tags Saving Storage System Information Ssid TagInformation Saved when the ExternalGroup Tag is Written MappedVolume TagInformation Saved when the Ssid Tag is Written ExternalGroup TagLayer Information Saved when the MappedVolume Tag is WrittenLU number of the external volume WWN of the external storage systemMapping External Volumes AddVolumeSetting TagAddVolumeSetting Tag Parameters WWN Alternate path DigitsAssigned to any Volume. An Or fewerSsid assigned to To Fffe Parameter Setting Range of ValuesCapacity Ldev in blocks For details, see RangeAddVolumeSetting2 Tag When Creating Multiple LDEVs in an External VolumeAddVolumeSetting2 Tag Parameters Values Parameter Setting RangeAssigned to any Volume However, an Ldkc number 00 toDisconnectVolume Tag Parameters DeleteVolume Tag Parameters Deleting the External Volume Mapping DeleteVolume TagCheckPath-RestoreVolume Tag Parameters Changing Path GroupUnitePathGroup Tag Structure and Identifier of Parameters DividePathGroup TagNumber Less Example of a SpreadsheetStructure and Identifier of Parameters UnitePathGroup Tag Example of a SpreadsheetExample Overview of Remote Command Devices Remote Command DevicesOverview of Remote Command Devices Guidelines for Remote Command Devices Remote Command DevicesUniversal Storage Platform Guidelines for Remote Command DevicesUniversal Storage Platform VM Restriction Mapping a Command Device as a Remote Command DeviceRestrictions on Remote Command Device Maximum capacityPage Procedure to Use Initiator/External MIX Mode Restrictions on Initiator/External MIX Mode General Troubleshooting for XP External Storage TroubleshootingTroubleshooting for XP External Storage ErrorStatus Description Unknown Troubleshooting the Mapping PathMapping Path Statuses and Required Actions Blockade External port is blocked ActionTo access the device of the external Changed the volume capacity wasAccess the device of the external ReducedInternal error Setting of the topology doesConnected through switches, Been stopped by timeoutStatus Description Device check error Troubleshooting Volume DiscoveryCauses of Volume Discovery Failure and Required Actions System becomes inaccessibleCalling HP Technical Support Calling HP Technical SupportConventions for Storage Capacity Values Support and Other ResourcesRelated Documentation HP Technical SupportHP Websites Subscription ServiceSubscription Service Documentation FeedbackSystem Parameters Connecting External Storage SystemsAMS/WMS Storage System System Parameters AMS/WMSStorage System Displayed Serial Number Model Window Names Parameters Parameter SettingsWMS Path Status and Examples of the Recovery Procedure AMS/WMS Path Status and Examples of the Recovery Procedure AMS/WMS Path status and examples of recovery procedureP9500 Disk Array Thunder 9500V Storage System System Parameters Thunder Path Status and Examples of the Recovery Procedure Relationship between the WWN of the Port and ControllerDisable the host group security Path Status and Examples of the Recovery Procedure ThunderChannel port properly using LUN Manager USP V/VM Storage SystemTagmaStore USP/NSC Storage System Path Status and Examples of the Recovery Procedure USP V/VMVolume operation again SecurityLightning 9900V Storage System Lightning 9900V Storage SystemPath Status and Examples of the Recovery Procedure Lightning Lightning 9900 Storage SystemSVS200 Storage System SVS200 Storage SystemSystem Parameters for Connecting an EVA Storage System Identifying Logical Volumes Using Characteristic2Path Status and Examples of the Recovery Procedure SVS200 HP StorageWorks EVA Storage SystemSun StorageTek FlexLine System Parameter Connecting Sun StorEdge 6120/6320Sun StorEdge 6120/6320 Behavior of the Alternate PathSystem Parameter Sun StorageTek FlexLine Sun StorageTekEMC CLARiiON CX Series System Parameter Sun StorageTekProcedure System Option modeRestrictions for Connecting an EMC CLARiiON CX Series EMC Symmetrix SeriesSystem Parameter for Connecting IBM SVC Series IBM DS3000/DS4000/DS5000 SeriesNon-HP Storage Systems System Parameter for Connecting Fujitsu FibreCAT CX SeriesFujitsu FibreCAT CX Series SGI IS4600 SeriesMaximum Usable Capacity of an External Volume Required Volume Capacity for Each Emulation TypeDetermining Required External Volume Capacity Required Volume Capacity for Each Emulation TypeCapacity 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 Overview of the ExPath Tool Preparing for Using the ExPath ToolExPath Tool ExPath ToolUninstalling the ExPath Tool Using the ExPath ToolInstalling the ExPath Tool Using the ExPath ToolCreating a Command File Creating an Authentication FileEditing the Java Security Policy Running the ExPath Tool Command List for the ExPath Tool Command ReferenceSvpip Command Command Purpose SvpipLogin Command Disconnect CommandCheckpath Command Checkstatus CommandExternal Volume Status Normal Destage Disconnect Checking External Volume Status Normal Destage Disconnect Checking Glossary 167SVP GlossaryIndex XP Continuous Access or XP Continuous Access Journal169 Index

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