Virtual LVI/LUN (VLL)

Consider the following for Virtual LVI/LUN (VLL):

•If you set the emulation type for the mainframe system as you map the external volume, you need to format the mapped volume or perform the Write to Control Blocks operation using the VLL function before you use the external volume.

For the volume formatting operation and Write to Control Blocks operation procedures, see the HP StorageWorks XP24000/XP20000 Virtual LVI/LUN (VLL) and Volume Shredder User Guide.

•If you create LDEVs in an external volume using the VLL function, the cache mode of the created LDEVs becomes the same as that of the source external volume.

Cache Residency Manager

Consider the following for Cache Residency Manager:

•The bind mode of the Cache Residency Manager operation cannot be specified for the external volume if the Cache Mode is set to Disable.

•If you use the mapped external volume for the Cache Residency Manager operation and set the bind mode, a cache of twice as much capacity as the user data is required for the Cache Residency Manager operation.

Performance Monitor and XP Auto LUN

Consider the following for Performance Monitor and XP Auto LUN:

•Performance Monitor can be used to display the monitoring information about the external volumes.

•Mapped volumes can be used for XP Auto LUN. For instructions on adjusting volume capacity, see “Adjusting the Volume Capacities for Pairs” (page 156).

For the configuration example of XP Auto LUN, see “XP Auto LUN Operations” (page 31).

XP Continuous Access and Hitachi TrueCopy™ for Mainframe

Mapped volumes can be used for XP Continuous Access and for TrueCopy for Mainframe. For a configuration example of XP Continuous Access, see “XP Continuous Access Operations” (page 32).

HP StorageWorks XP Continuous Access Journal Software and Hitachi Universal Replicator™ for Mainframe

Mapped volumes can be used for XP Continuous Access Journal and Universal Replicator for Mainframe. For a configuration example of XP Continuous Access Journal, see “XP Continuous Access Journal Operations” (page 33).

HP StorageWorks XP Business Copy Software and Hitachi ShadowImage™ for Mainframe

Mapped volumes can be used for XP Business Copy and ShadowImage for Mainframe. For a configuration example of XP Business Copy, see “XP Business Copy Operations” (page 35).

30 About XP External Storage Operations