HP XP20000 Mapping a Command Device as a Remote Command Device, Restriction, Maximum capacity

Page 122

Table 30 Restrictions on Remote Command Device

Item

Restriction

Emulation type

OPEN-V

Number of LDEVs in an external volume

1

Cache mode

Disable

Minimum capacity

96,000 Blocks (about 47 MB)

Maximum capacity

4 TB

The remote command device cannot be identified by the port discovery or volume discovery of XP External Storage.

When an external storage system (A) has a remote command device (B) [that is, when a command device in another external storage system (C) is mapped to this external storage system (A)], make sure that the remote command device (B) does not have the smallest LUN ID on the port in the external storage system (A).

You cannot execute I/Os to the remote command device.

You cannot set the command device disable on the remote command device.

You cannot set the command device security on the remote command device.

Do not set the command device security on the external storage system side for the command device that is mapped as a remote command device.

You cannot create a LUSE volume using a remote command device.

You cannot create CVs using the VLL function in the remote command device.

Cache Residency Manager is not available on the remote command device.

Mapping a Command Device as a Remote Command Device

The command devices that can be mapped as remote command devices appear in the Device column of the Volume Operation window as shown in Table 29 (page 121).

To map a command device, select a command device that can be mapped and follow the procedure in “Mapping an External Volume Automatically” (page 67).

Using XP Continuous Access or XP Continuous Access Journal with Remote Command Device

When you want to use XP Continuous Access or XP Continuous Access Journal with a remote command device, you need two different kinds of ports, which are an initiator port for XP Continuous Access or XP Continuous Access Journal and an external port for the remote command device. However, if you set the Initiator/External MIX mode, you will be able to use a port as both initiator port for XP Continuous Access or XP Continuous Access Journal and external port only for the remote command device.

Before you set the Initiator/External MIX mode, you need to prepare initiator ports and external ports in one port block of the Standard mode. You can set the Initiator/External MIX mode on the port block that consists of the initiator ports and external ports.

Figure 42 (page 123) shows the difference between the Standard mode and Initiator/External MIX mode. When the Standard mode is set to the ports, you have to connect the cables for both initiator port and external port. However, if you set the Initiator/External MIX mode, you just need to connect one cable, and you can use XP Continuous Access or XP Continuous Access Journal and remote command device.

122 Remote Command Devices

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Contents Abstract Third November Edition Date Description First JuneSecond September Fourth JanuaryContents Performing XP External Storage Operations Using the XP External Storage GUIPreparing for XP External Storage Operations Remote Command Devices 119 101Support and Other Resources 132 Troubleshooting 126Connecting External Storage Systems 134 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 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 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 MappingUsing a Mapped External Volume from a Connected Host Using a Mapped External Volume from a Connected HostStoring New Data in the Mapped External Volume 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 RequirementsXP External Storage Requirements Guidelines for XP External Storage OperationsMapping Guidelines Application HDD Type FC/SSD 1 When the Emulation Type of the External Volume is for OpenRecommended Applications According to HDD Type Database YesDatabase Not Recommended Capacity GuidelinesApplication HDD Type 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 GuidelinesUninstalling 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 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 PortsPerforming XP External Storage Operations Overview of Setting OperationsOverview of Setting 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 Ldev Information Dialog Box Checking the External Volume DetailsChecking the External Volume Details 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 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 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 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 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 VM Guidelines for Remote Command DevicesUniversal Storage Platform 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/WMSWMS 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 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 ToolEditing the Java Security Policy Creating an Authentication FileCreating a Command File 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 Glossary169 XP Continuous Access or XP Continuous Access JournalIndex Index
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