HP StorageWorks XP Remote Web Console Software - Manual (Page 22)

during a reverse copy operation is COPY(RS-R), and the P-VOL and S-VOL become inaccessible
to all hosts for write operations during a reverse pairresync operation. As soon as the reverse
pairresync is complete, the P-VOL becomes accessible.
Note: The P-VOL remains read-enabled during the reverse pairresync operation only to enable the
volume to be recognized by the host. The data on the P-VOL is not guaranteed until the reverse
pairresync operation is complete and the status changes to PAIR.
• Quick Restore (backward pairresync in fast speed)
The quick restore operation (see Figure 7 on page 23) speeds up reverse copy by changing
the volume map in the storage system to swap the contents of the P-VOL and S-VOL without
copying the S-VOL data to the P-VOL. The P-VOL and S-VOL are resynchronized when update
copy operations are performed for pairs in the PAIR status.
The pair status during a quick restore operation is COPY(RS-R) until the volume map change is
complete. The P-VOL and S-VOL become inaccessible to all hosts for write operations during
a quick restore operation.
Notes :
• After quick restore operation is executed, 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 restore operation is performed. To update
configuration information on the Remote Web Console, wait until the quick restore operation
completes and then click File and then Refresh on the menu bar of the window.
• If the differential data between P-VOL and S-VOL is small, the reverse copy operation may be
completed faster than the quick restore operation.
Figure 7 on page 23 illustrates how the data changes during the backward pairresync operations.
22 About Business Copy Operations