HP 3PAR Operating System Software - Manual (Page 206)

Snapshots and Resynchronization Failure
If the primary system fails during resynchronization, Remote Copy uses the snapshot taken on the
backup system to recover the backup system’s consistent state before the resync operation began:
•
If a volume did not resynchronize, Remote Copy automatically promotes the snapshot to the
secondary base volume.
•
The duration of the promotion operation is proportional to the amount of data changed before
the resynchronization failed.
•
If some of the volumes in the volume group successfully synchronized before the failure, Remote
Copy does not revert these volumes to the pre-resynchronization state. Remote Copy reverts
only the volumes that failed to resynchronize.
Snapshots Taken before or during Disaster Recovery
If the backup storage system is temporarily converted to a primary storage system (for example,
during disaster recovery or as part of planned downtime), Remote Copy:
1.
creates a snapshot on the natural backup system
2. uses this snapshot to resynchronize the natural primary system after the primary system and
the links are brought back up and Remote Copy resumes operations
Additional Information: “Recovering from Disaster” (page 102)
206 Remote Copy Snapshots