HP StorageWorks Snapshot XP user guide (T1713-96021, June 2006)

Snapshot XP user guide 15
2 Snapshot XP functions
Snapshot XP creates pairs consisting of a P-VOL and S-VOL. When creating a pair, Snapshot XP uses a
V-VOL as the pair’s S-VOL. In addition, you can manage the P-VOL’s snapshot data by copying the data
to an area called the pool. This chapter describes the volumes Snapshot XP uses first, and then describes
Snapshot XP functions.
Volumes Snapshot XP uses
Snapshot XP uses the P-VOL, S-VOL, and pool-VOL. This section describes the requirements (such as
emulation type or path definition) for the volumes Snapshot XP uses.
Snapshot XP primary volumes
Snapshot XP secondary volumes
Table 2 Requirements for Snapshot XP P-VOLs
Item Requirement
Volume type Logical volume (LDEV)
LUSE volume can be specified.
NOTE: A LUSE P-VOL must be paired with an S-VOL that has the same size and structure.
For example, if a LUSE P-VOL is created by combining volumes that have 1 GB, 2 GB, and
3 GB in that order, you must specify a LUSE volume that has exactly the same size and
combination order as the S-VOL.
You cannot specify the following volumes as Snapshot XP P-VOLs:
• Volumes used as pool-VOLs
• Volumes used as a Snapshot XP pair’s S-VOL
• Volumes used by a Flex Copy XP pair
• NAS volumes
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 you can create” on page 22.
Path definition Required
Maximum capacity 2 TB
Table 3 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