Disconnecting External Arrays Or Lus; Volume Detail Window - HP StorageWorks XP12000 User Manual

volume in the LDEV list, the Volume Detail window displays a list of all LDEVs that make up the LUSE
volume.
Figure 56

Volume Detail window

You can also check the LDEVs making up a LUSE volume by selecting View all Volumes at the bottom of the
LDEV Information window. However, only LDEVs in the specified external LU appear. The Volume Detail
window displays all LDEVs, including LDEVs of other external LUs.
The Volume Detail command is available after you restore the external LU using the Restore command.

Disconnecting external arrays or LUs

Use the Disconnect Subsystem and Disconnect Volume commands to disconnect external LUs. This is
necessary, for example, before turning off the power on local arrays or external arrays for maintenance or
before deleting an external LU's mapping.
The Disconnect Subsystem or Disconnect Volume command stops all host I/O to the mapped external LU,
and writes all data in the XP12000/XP10000/SVS200 cache memory to the external LU (all data is
destaged).
Mapping settings are preserved, even though the external LU is disconnected using the Disconnect
Subsystem or Disconnect Volume command. Therefore, you can resume using the external LU as a mapped
volume with the former settings. For instructions, see
external LU operations (Check Paths & Restore
CAUTION: Note the following for the Disconnect Subsystem and Disconnect Volume commands:
• After executing the Disconnect Subsystem or Disconnect Volume command, click the Refresh button (
on the Command View XP or XP Remote Web Console main pane to update the information, and
check the current progress status.
• If you execute the Disconnect Subsystem or Disconnect Volume command when I/Os from an
open-system host are in progress, host I/Os to the specified volume are forcibly stopped. When
executing the Disconnect Subsystem or Disconnect Volume command, stop host I/Os, and unmount the
volume from the host.
• If the volume is online from the mainframe host, you cannot execute the Disconnect Subsystem or
Disconnect Volume command. Stop host I/Os to the volume, and perform the Vary Offline operation.
• You cannot execute the Disconnect Subsystem or Disconnect Volume command for external LUs that
include LDEVs that are set as the copy pair for Flex Copy XP, Business Copy XP, ShadowImage for
z/OS, Continuous Access XP Journal, Universal Replicator for z/OS, Continuous Access XP, TrueCopy
for z/OS, or Snapshot XP. However, if the copy pair status is PSUE, you can execute these commands.
• You cannot execute the Disconnect Subsystem ore Disconnect Volume command for external LUs that
include LDEVs for which Auto LUN XP's migration processing is in progress.
"Checking the connection status and resuming
Vol.)" on page 97.
External Storage XP user guide
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