HP StorageWorks XP Remote Web Console Software - Manual (Page 163)

The following are the restrictions on LDEVs and LUSE volumes for the Volume to Space operation:
• The LDEV must not be path-defined (including Hitachi TrueCopy for z/OS, Continuous Access XP,
Hitachi 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 of Data Retension Utility*1.
*1: A Data Retension Utility extent is a data area in an OPEN-V volume to which a VMA area is
set. By using XP RAID Manager library, the Read Only attribute can be set to the extent. If an extent
is set to a volume, VLL and LUSE functions cannot be used for the volume. In other words, the
volume cannot be combined with other volumes and cannot be divided into multiple volumes. To
use the VLL and LUSE functions for such a volume, you must delete Data Retension Utility extent
from the volume by using XP Remote Web Console or XP RAID Manager library.
NOTE:
When the Volume to Space function is performed, the alias information which is set to the specified
LDEV is also deleted. If you set an alias to the LDEV, you must migrate the alias information to another
LDEV before the Volume to Space function is performed, or you must reset the alias after the Volume
to Space function is performed.
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.
For OPEN-V volumes, there are four ways to create CVS volumes ( Table 21 ). You can specify from
46 MB (50 cylinders) up to the VDEV's maximum capacity for a CVS volume's capacity.
Table 21 Creating CVS volumes using Install CV (for OPEN-V)
Description Install CV method
Used to specify the capacity and number of CVs in the CVS volume you want to
create.
Specify size and number
XP LUN Configuration and Security Manager User Guide 163