26 Business Copy XP (BC) for the XP10000/XP12000
NOTE: The P-VOL remains read-enabled during the reverse pairresync operation only to enable the
host to recognize the volume. Data on the P-VOL is not guaranteed until the reverse pairresync
operation is complete and the status changes to PAIR.
• Quick Restore. This operation (Figure 5) speeds up reverse resync by changing the volume map in the
disk array 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 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. Quick restore cannot be performed on L2 cascade pairs. Table 9 shows the
requirements for reverse and quick restore pairresync operations. If you perform these operations on
pairs that do not meet the requirements, the reverse copy or quick restore command is rejected.
Figure 5 Reverse and quick restore pair operations
NOTE: The P-VOL remains read-enabled during the quick restore operation only to enable the host to
recognize the volume. Data on the P-VOL is not guaranteed until the quick restore operation is complete
and the status changes to PAIR.
NOTE: When a quick restore operation is in progress, the array management user interface may display
old configuration information. To update the information in the user interface, wait for the quick restore
operation to finish, and click Refresh.
To Next Page
Loading...
Need help?
General
