HP StorageWorks Snapshot XP user guide (T1713-96023, October 2006)

2 Sna pshot 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-VO L's snapshot data by copying the
data to an area c alled the pool. This chapter d escribes the volumes S napshot 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 t y
pe or path definition) for the volumes Snapshot XP uses.
Snapshot XP primary volumes
Table 2 Requirements for Snapshot XP P-VOLs
Item
Requirem ent
Volume type Logical vol
ume (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 exa mple, if a LUSE P-VOL is created by combining volumes that
have 1 GB, 2 GB, and 3 GB i n 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:
• Volumesusedaspool-VOLs
• Volumes used as a Snapshot XP pair's S-VOL
• Volumes used by a Flex Copy XP pair
• NAS volumes
Emulati
on 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 crea te.
Path definition
Required
Maximum capa city
2TB
HP StorageWorks Snapshot XP user guide
15