HP XP7 Continuous Access Journal User Guide (TK911-96002)

Prerequisites for resynchronizing pairs
• This operation is performed from the primary system only.
• Pair status must be PSUS or PSUE.
If pair status is HOLD, HOLDING, or HLDE, use the resynchronizing mirrors operation (see
“Resynchronizing mirrors ” (page 50)).
• Pairs suspended by the system (PSUE status) can be resynchronized after the error causing
the suspension is corrected.
The following additional information may be useful before beginning the procedure:
• Performing the operation on a pair in HLDE status changes the status to HOLD.
• The primary system does not resynchronize a pair that is suspended due to an error until the
cause of error is resolved.
• If P-VOL status is Failure and S-VOL status is unpaired, the pair cannot be recovered by
resynchronizing. It must be deleted and created again.
• Resynchronizing pairs when I/O load is low reduces impact on performance. Operations on
multiple pairs in the same mirror with different statuses may results in suspension during periods
of heavy write I/O.
• If you resynchronize pairs in PAIR status and other than PAIR status in the same mirror, an
unexpected suspension could occur during the operation under heavy I/O load conditions.
You can estimate whether the I/O load is heavy or not from frequency of host I/Os. This
operation should be performed under light I/O load conditions.
Procedure 5 To resynchronize a pair
1. In the Storage Systems tree, click Replication > Remote Replication, and then select the Cnt
Ac-J Pairs tab.
2. From the Actions menu, click Remote Replication > Resync Pairs.
3. In the Resync Pairs window, review the pairs in the Selected Pairs table. You can remove a
pair from the table by selecting it and clicking Cancel.
Resynchronizing Cnt Ac-J pairs 49