HP StorageWorks LUN Configuration and Security Manager XP User Guide for the XP1024/XP128 (T1614-96005, March 2006)

LUN Configuration and Security Manager XP user guide for the XP1024/XP128 55
• 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: Converts a custom volume back to a normal volume (VDEV).
The Make Volume function clears all custom volumes under a CVS 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 CVS volume, and reformats the
CVS 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: CVS operations are destructive. Back up your data before performing CVS operations.
Figure 27 and Figure 28 show a sample VDEV (whose components are LDEVs) in its initial condition and
the VDEV after custom volumes are created.
Figure 27 CVS process (all supported emulation types except for OPEN-V)
Figure 28 CVS process (OPEN-V)
Parity group configuration
This section explains the parity group configuration of emulation types other than OPEN-V. OPEN-V
volumes always consist of variable sized volumes instead of fixed-size volumes (FVs). To use OPEN-V,
parity groups must be enabled to support the OPEN-V emulation type. To enable OPEN-V, contact your
HP account support representative.