HP LUN Configuration Manager XP Software - Manual (Page 121)

VSC operations 121
2. When the CVS confirmation message displays, make sure that I/Os of
the volumes for which you want to perform the Volume to Space
operation have been stopped.
The CVS confirmation warning message appears.
3. Select OK to continue the operation or select Cancel to stop the
operation and return to the Function Select window.
The Number of CU Configuration window opens.
4. Select the number of CUs that are configured for this subsystem, and
select Next.