HP XP LUN Configuration and Security Manager Software - Manual (Page 39)

LUN Configuration and Security Manager XP user guide for the XP10000/XP12000 39
A small custom volume can be used as a command device. This leaves the rest of the LDEV free for other
uses.
VSC operations
VSC operations include the following:
• Volume to Space: Formats one or more LDEVs on a selected VDEV into free space, which can be used
to install one or more custom volumes using the Install CV function, or left as free space for future use.
• Install CV: Creates custom volumes from free space.
• Make Volume or Volume Initialize (supported for OPEN-V VDEVs only for XP12000 arrays): Converts a
custom volume back to a normal volume (VDEV).
The Make Volume function clears all custom volumes under a VSC volume and creates an initial volume
(VDEV) that consists of new user-defined custom volumes.
The Volume Initialize function uninstalls all custom volumes under a VSC volume, and reformats the VSC
volume as a normal volume (VDEV).
Compared to other emulation types, use OPEN-V to easily create volumes of any size. OPEN-V volumes
always consist of custom volumes, instead of fixed-size volumes.
CAUTION: VSC operations are destructive. Back up your data before performing VSC operations.
Figure 17 and Figure 18 show a sample VDEV (whose components are LDEVs) in its initial condition and
the VDEV after custom volumes are created.
Figure 17 VSC process (all supported emulation types except for OPEN-V)
Figure 18 VSC process (OPEN-V)