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

26 Using Snapshot XP
If a failure occurs when restoring a Snapshot XP pair, the pair’s snapshot data is written back to the
P-VOL. You might not be able to restore the pair if another pair is being restored.
For more information about the status of Snapshot XP pairs and operations on pairs, see ”Status of
Snapshot XP pairs” on page 26.
Status of Snapshot XP pairs
When creating or splitting a Snapshot XP pair, the pair status changes. Figure 4 shows the transition of
the Snapshot XP pair status.
Figure 4 Snapshot XP pair status transition
1. If a volume is not assigned to a Snapshot XP pair, its status is SMPL.
2. Issue the paircreate command on the SMPL volume to create a Snapshot XP pair. When creating
the first pair for the P-VOL, the pair status changes to COPY. When the operation completes, the pair
status changes to PAIR.
If you specify a volume that is already paired with one or more S-VOLs as the P-VOL to create another
pair, the pair status does not change to COPY. When the operation completes, the pair status changes
to PAIR.
NOTE:
• If you execute the paircreate command immediately after deleting the P-VOL’s last snapshot
data, it might take time to create a new pair.
• If the pool capacity exceeds the threshold when a Snapshot XP pair is in PAIR status, the pair
status changes to PFUL in RAID Manager XP. For more information, see the HP StorageWorks
RAID Manager XP user guide.
•If you issue the paircreate command when the pool capacity exceeds the threshold, the
command is rejected and you cannot create the pair.