HP StorageWorks XP Remote Web Console Software - Manual (Page 82)

To resynchronize one or more Business Copy pairs that have been split or suspended:
1. Unmount the split (PSUS) S-VOLs from the host before starting the pairresync operations.
When the pairresync operation starts, the storage system will stop accepting write I/Os to
the S-VOL.
2. Go to the Pair Operation window, and select the desired port or host group in the Tree to
filter the volumes displayed in the Volume List.
3. On the Pair Operation window, select the pairs in PSUS, PSUS(SP), or PSUE status, right-click the
selected pairs to display the pop-up menu, and then select the Pairresync command to open
the Pairresync dialog box.
4. On the Pairresync dialog box, select the pairs you want to resynchronize.
Note: To remove the pairs in the Pairresync Volume List, select and right-click the pair, and then
select the Delete command in the pop-up menu.
5. Select the desired copy pace from the Copy Pace drop-down list.
6. Select the desired resync type for each pair from the Resync Type drop-down list.
WARNING: Make sure to select the correct resync direction (normal/quick, or reverse/quick
restore).
Cautions:
• If you do not want the P-VOL and S-VOL to be resynchronized after the quick restore
operation, you must set the Swap&Freeze option before performing the quick restore
operation (see “ Swap&Freeze Option ” on page 27 and “ Setting Options ” on page 65).
• If the reverse or quick restore pairresync operation is performed on one Business Copy
pair in a 1-to-n Business Copy configuration (n>1), the P-VOL and the other S-VOLs are
no longer synchronized.
Notes:
• Reverse and quick restore operations cannot be performed on pairs in the PSUE or PSUS(SP)
status, or on L2 cascade pairs.
• When a quick restore operation is in progress, the Remote Web Console window may
display old configuration information on components such as logical volumes (LDEVs); the
window may display configurations before the quick operation is performed. To update
configuration information on the Remote Web Console window, wait until the quick restore
operation completes and then click File and then Refresh on the menu bar of the window.
7. Click OK to reflect the settings displayed in the Pairresync dialog box to the Preview List on
the Pair Operation window.
Note: If you try to perform the quick restore operation to the pair you select from the Pairresync
Volume List that is composed of volumes stored in multiple cache logical partitions (CLPRs), a
message asking you whether you want to click OK and continue the operation will appear. Click
OK if you do, or click Cancel to discontinue the quick restore operation.
8. Repeat steps 6 through 7 until the Preview List on the Pair Operation window displays the
desired pairs (settings).
9. Make sure to verify that the S-VOLs are offline before starting the pairresync operations.
10. On the Pair Operation window, click Apply to resynchronize the specified pairs.
The Pair Operation window will then display the results of the pairresync operations (that is, pair
status changed to COPY(RS), COPY(RS-R), or PAIR) and the progress (%) of the update copy
operation. The pair status will change to PAIR right away, if the update copy operation is
not necessary.
Cautions:
• When reverse or quick restore resync operation ends abnormally, or, Pairsplit-E (PSUE) is
requested during reverse or quick restore resync operation, the pair status changes to PSUE. The
P-VOL of the PSUE pair is read- and write-enabled for all hosts; however, the data on the P-VOL is
not guaranteed. The S-VOL of the PSUE pair remains write-disabled (read-only); however, the
data on the S-VOL is not guaranteed.
• Even when reverse or quick restore resync operation ends abnormally, or, Pairsplit-E (PSUE) is
requested during reverse or quick restore resync operation, the status of other Business Copy pairs
that share the same P-VOL does not change.
82 Performing Business Copy Operations