HP XP P9500 Storage - Manual (Page 123)

5. In the Pairresync dialog box, select the Resync Type as follows:
•
Normal Copy(P->S) to resynchronize the pairs normally. All differential data is updated
to the S-VOL.
•
Quick Resync(P->S) to immediately change pair status to PAIR. Resynchronization of data
does not occur immediately. Differential data is copied during update copying.
•
Reverse Copy(S->P) to copy the S-VOL data to the P-VOL. All differential data is updated
to the P-VOL. Not available for L2 pairs.
•
Quick Restore(S->P) to swap the P-VOL and S-VOL. Any differential data between the
volumes is copied during update copying. Not available for L2 pairs.
6. From Copy Pace, select the pace at which the pairs are to be resynchronized, Slower, Medium,
or Faster. Copy Pace affects the host I/O performance: a slower pace minimizes impact, a
faster pace has the greatest impact. The pace you select is applied for all pairs in the operation.
7. Click OK.
8. In the Pair Operation window, review the information in the Preview list. To change a selection,
right-click it, select Modify, and make any changes.
9. Click Apply to commit the operation to the storage system.
10. Make sure that pair status changes to PAIR before attempting any other operation.
NOTE: If the reverse or Quick Restore ends abnormally, the pair is suspended (PSUE status). In
this case, the P-VOL is read/write-enabled for all hosts, but the data is not guaranteed. The S-VOL
remains write-disabled (read-only) and data is not guaranteed. The status of other pairs sharing
the same P-VOL does not change.
Deleting pairs
You can delete a pair when you do not need it. Deleting a pair unassigns the P-VOL and S-VOL
from the pair (SMPL status) and their data remains intact. After deletion, both volumes are available
for use in another pair.
Prerequisite information
•
The pair cannot be in the process of Quick Split (PSUS(SP)/PSUS status).
•
When a pair is created, the processor blade allocated to the P-VOL's LDEV is also allocated
to the S-VOL's LDEV. When a pair is deleted, the processor blade that was originally allocated
to the S-VOL'S LDEV is allocated to it again. If the original processor blade was removed,
another processor blade is allocated.
Deleting pairs 123