HP StorageWorks User Manual

92 External Storage XP for the XP12000/XP10000
Deleting external LU mappings (Delete LU)
You can start deleting external LU mappings from the LU Operation pane. To delete the external LU
mapping, select Delete LU from the shortcut menu displayed in the LU Operation pane. Although you can
use the Delete LU command to delete the mapping between an internal XP LDEV and external LU, you
cannot use this command to reliably delete data in the external LU or internal XP LDEV.
Before deleting the external LU mapping, execute the Disconnect Subsystem or Disconnect Volume
command. All data in the XP12000/XP10000 cache memory must be written to the mapped external LU
using one of these commands before deleting the LU. For more information about the Disconnect
Subsystem and Disconnect Volume commands, see ”Disconnecting external disk arrays or external LUs” on
page 85.
NOTE: Before deleting the external LU mapping, stop the execution of any application that is using a
command device on that external LU.
Before deleting the external LU mapping, notice if any of the following are true:
• Whether or not the execution of any application (for example, RAID Manager) that is using the
command device is in progress.
If any application using an external LU command device is executing, stop the application.
• Whether the Disconnect Subsystem or Disconnect Volumes command was executed.
All data in cache memory must be written into the mapped external LU using the Disconnect Subsystem
or Disconnect Volume command. For more information about the Disconnect Subsystem and Disconnect
Volume commands, see ”Disconnecting external disk arrays or external LUs” on page 85.
• The LDEV is part of a LUSE volume.
• A path to the external device exists.
• The LDEV is configured as part of a Continuous Access XP, Continuous Access XP Journal, or Business
Copy XP pair.
• The LDEV is set as the reserved LU for Business Copy XP or Auto LUN XP.
If any of these conditions are true, you cannot delete the external LU mapping.
1. In the LU Operation pane, select the external LU group number in the Device tree. Information about the
external LU mapped as an internal XP LDEV appears in the Device list.
2. In the Device list, right-click the external LU, and select Delete LU.
Settings appear in blue italics in the Device list, and they appear in the Preset list. To check details
regarding intended changes, right-click the setting in the Preset list, and select Detail. To cancel
settings, right-click the setting in the Preset list, and select Delete.
3. Click Apply. A confirmation message appears.
If you already stopped the application, go to step 4. If you have not stopped the application, click
Cancel, stop the application, and retry the operation.
4. Click OK. A confirmation message appears.
5. Click Yes or No.
•If you click Yes, a confirmation message appears. To cancel the operation, click Cancel. Otherwise
go to step 7.
•If you click No, a warning message appears. To cancel the operation, click Cancel.
NOTE: If you click OK in response to the warning, the Delete LU operation is performed, but data
in the XP12000/XP10000 cache memory that is not yet written to the external LU might be lost.
6. Click OK. A confirmation message appears.
7. Click OK. The external LU whose mapping is deleted is removed from the Device list.

HP StorageWorks Specifications

General

Brand	HP
Model	StorageWorks
Category	Storage
Language	English