HP StorageWorks Snapshot XP user guide (December 2005)

14 Snapshot XP
Snapshot XP secondary volumes
Snapshot XP pool volumes
Creating virtual volume management areas
To use Snapshot XP, you must create virtual volume (V-VOL) management areas. The V-VOL management
area is an important area for associating Snapshot XP S-VOLs (V-VOL) with pool-VOLs. The V-VOL
management area is created automatically when additional shared memory is installed. For more
Path definition Required
Maximum capacity 2 TB
Table 1 Requirements for Snapshot XP P-VOLs (continued)
Item Requirement
Table 2 Requirements for Snapshot XP S-VOLs
Item Requirement
Volume type V-VOL
You cannot specify the following volumes as Snapshot XP S-VOLs:
• Volumes used as a Snapshot XP pair’s S-VOL
• Volumes used by another software product’s pair or migration plan
NOTE: A LUSE S-VOL must be paired with a P-VOL that has the same size and structure.
Emulation type OPEN-V
Maximum number 8,191
For more information about the maximum number of Snapshot XP pairs that can be created,
see ”Calculating the number of Snapshot XP pairs that can be created” on page 19.
Path definition Required
Table 3 Requirements for Snapshot XP pool-VOLs
Item Requirement
Volume type Logical volume (LDEV)
You cannot specify the following volumes as Snapshot XP pool-VOLs:
• External volumes
• LUSE volumes
• Volumes used as a Snapshot XP pair’s P-VOL or S-VOL
• Volumes used by another software product’s pair or migration plan
• Volumes set with the Protect or Read Only attribute, or set to the S-VOL Disable setting by
LUN Security Extension XP
• NAS volumes
Emulation type OPEN-V
Maximum number 131,072
However, the maximum number of pool-VOLs that can be registered in each pool is 1,024.
In addition, a volume already registered as a pool-VOL in a pool cannot be registered in
another pool.
Path definition Not required
Volumes with path definitions cannot be specified as pool-VOLs.