HP 3PAR Remote Copy Software - Manual (Page 56)

2.40 Error Handling
Remote Copy User’s Guide InForm OS Version 2.3.1
As long as you have set the synchronization period using the setrcopygroup command, an
asynchronous periodic volume group is automatically resynchronized at the scheduled
synchronization interval. When you set the resynchronization period for the primary group, it
is automatically mirrored to the secondary.
During the resynchronization, two read-only snapshots of the primary volume are compared
and any pages that are different are read from the newer snapshot. A failure of such a read
results in the cancellation of the resynchronization process, with the backup volume marked
Stale . At this point, the snapshots on the secondary volume are automatically promoted. The
Stale state indicates that the secondary has a valid point-in-time copy of the primary,
however the last attempt at synchronization failed. If there is no error during the next
scheduled synchronization and it completes successfully, the volume state becomes Synced . If
you need to synchronize the volumes immediately rather than waiting for the next scheduled
synchronization time, you can manually issue the syncrcopy command.
Other synchronization states might be indicated as follows:
◆ New - Remote copy for the volume has not started.
◆ Syncing - The secondary volume is currently being synchronized with the primary.
◆ Synced - The primary and secondary volumes are currently in sync (for periodic mode
volumes this indicates the last synchronization.
◆ NotSynced - The primary and secondary volumes are not in sync.
◆ Stopped - The primary and secondary volumes were in sync the last time the group was
started, but now may not be due to the group being stopped.
◆ Stale - The secondary has a valid point-in-time copy of the primary, however the last
attempt at synchronization failed.
NOTE: There is no default synchronization period. Therefore, if you have not
specified a synchronization period using the setrcopygroup command,
automatic resynchronizations will not take place. The minimum interval for
periodic resynchronization is five minutes.