HP StorageWorks XP Remote Web Console Software - Manual (Page 132)

132 Overview of Volume Manager and Custom Volume Size
As the result of CVS operations, a VDEV contains FVs, CVs, and free spaces that are delimited in logical
cylinders. Sequential free spaces are combined into a single free space (see Figure 82 ).
Figure 82 Virtual CVS volume configuration
Volume to Space function
This function converts one or more LDEVs (FVs or CVs) into free space, which deletes the selected LDEVs
from that VDEV.
The following are the restrictions on LDEVs and LUSE volumes for the Volume to Space operation:
• The LDEV must not be path-defined (including TrueCopy for z/OS, Continuous Access XP,
ShadowImage for z/OS, Business Copy XP, and Continuous Access XP Journal pair volumes).
• The LDEV must not be a component of a LUSE volume.
• The LDEV must not be reserved for Auto LUN XP.
• The LDEV must be read/write-enabled.
• The LDEV or LUSE volume must not be a pool volume (pool-VOL).
• The LDEV must not be a journal volume.
• The LDEV must not be a remote command device.
• The LDEV must not contain extents.
Install CV function
This function defines and installs one or more CVS volumes under an existing volume (free space in a
VDEV). You can assign a specific number of physical cylinders (for mainframe systems) or MBs (for open
systems) to each CVS volume for maximum control over the volume size. When you specify the capacity
and an emulation type other than OPEN-V for a CVS volume to be created, the Install CV function
automatically creates and formats the CVS volume in sufficient free space. You must specify new CU and
LDEV numbers for the created CVS volume. The created CVS volume contains the user-specified number of
user cylinders and a predetermined number of control cylinders according to the emulation type.
NOTE: If you select free space and perform an Install CV operation, CVS volumes are created only in the
selected free space.