HP XP External Storage Software - Manual (Page 133)

NOTE:
If you click OK in response to the warning, the Delete LU operation is performed, but data
in the local array cache memory that is not yet written to the external LU might be lost.
6. Click OK. The external LU whose mapping is deleted is removed from the Device list.
If errors occur, failed settings and error codes appear in the Preset list. To check error messages,
right-click the failed setting, and select Detail.
External Storage XP user guide for the XP12000, XP10000, SVS200 133