HP StorageWorks User Manual page 35

• You can delete up to 256 mappings for external LUs at one time.
• Mapping operations cannot be performed if some parts of the local disk array are blocked. In this
case, restore blocked parts of the local disk array, and retry the operation.
• When using the Thunder 9500V series subsystem as an external disk array, the following versions are
recommended. If you use a 9500V disk array with a version that is earlier than the following versions,
the SATA drive information might not display correctly.
• For Thunder 9530V, Thunder 9520V, Thunder 9570V: version 0658 or later
• For Thunder 9580V, Thunder 9585V: version 1658 or later
• Do not map multiplatform volumes of external disk arrays as internal XP LDEVs.
• After executing the Check Paths & Restore Vol., Disconnect Subsystem, or Disconnect Volume
command, click the Refresh button (
pane to update the information, and check the current status.
• When the external LU's status is Blockade, execute the Check Paths & Restore Vol. command.
If the Check Paths & Restore Vol. command does not restore the external LU's status, the path to the
external disk array might be blocked. In this case, see
page 95 for instructions on restoring the path to the external disk array.
If the external LU's status remains Blockade even if you restored the path to the external disk array and
executed the Check Paths & Restore Vol. command, execute the Restore command.
• If you execute the Disconnect Subsystem or Disconnect Volume command when I/Os from the open
system host are in progress, host I/Os to the specified volume are forcibly stopped. When you execute
the Disconnect Subsystem o 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 copy pairs 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 or 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 displayed information
for Ex-Dev. Status in the Device list becomes Cache Destage. Even if there is no data left in cache
memory, the displayed status stays 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 displayed information for Ex-Dev. Status in the Device list
becomes Disconnect.
• When using the mapped external LU from the mainframe OS, set the Missing Interrupt Handler (MIH)
timer to 45 seconds, which is the recommended value.
• In the internal processing, the external LU's RAID level is handled as RAID-1 across the board. A bar (–)
appears on the Command View XP or XP Remote Web Console panes. The external LU's RAID level is
reported as RAID-1 when information about the external disk array is reported to higher-level devices
(OS).
) on the Command View XP or XP Remote Web Console main
"Troubleshooting External Storage XP" on
External Storage XP user guide 35