HP XP External Storage Software - Manual (Page 122)

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.
When the external LU is set as a pool volume (pool-VOL) and the Snapshot XP pair's status is PAIR,
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.
• When executing the Disconnect Subsystem or Disconnect Volume command, the Ex-Dev. Status column
in the Device list changes to Cache Destage. Even if there is no data left in cache memory, the displayed
status remains as Cache Destage, until the Disconnect Subsystem or Disconnect Volume command
processing is complete.
• When the Disconnect Subsystem or Disconnect Volume command is executed and all data in cache
memory is written to the external LU, the Ex-Dev. Status column in the Device list changes to Disconnect.
Disconnecting all external LUs in an external array (Disconnect Subsystem)
1. In the LU Operation pane, select External Devices in the Device tree. Connected external arrays
appear in the Device list.
2. In the Device list, right-click the external array you want to disconnect from the local array, and
select Disconnect Subsystem.
Configuring external LUs 122