HP StorageWorks XP10000 Disk Array - Manual (Page 145)

• 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.
For OPEN-V volumes, there are four ways to create CVS volumes ( Table 22 ). You can specify from 46 MB
(50 cylinders) up to the VDEV's maximum capacity for a CVS volume's capacity.
Table 22 Creating CVS volumes using Install CV (for OPEN-V)
Install CV method Description
Specify size and number Used to specify the capacity and number of CVs in the CVS volume
you want to create.
Divide free space by number Used to create CVS volumes by specifying the number of CVs in the
CVS volume to be created.
Divide free space by size Used to create CVS volumes by specifying the capacity of CVs in the
CVS volume to be created.
Set remaining space as volume Used to create a CVS volume using the remaining space on the VDEV.
NOTE:
CVS functions are not available for OPEN-L and OPEN-M volumes.
NOTE:
The install CV function allocates CVS volumes in the order in which the function finds sufficient free
space for the CVS volumes. For optimum space allocation, allocate CVS volumes in descending order
of capacity.
Table 23 lists the CVS specifications and the minimum and maximum CVS volume capacities for
mainframe and open systems.
HP StorageWorks LUN Configuration and Security Manager XP user guide for the
XP12000/XP10000/SVS200
145