Chapter 6: Replication
Replication
Quantum DXi6900 User’s Guide
136
Task Overview: Recovering a Replicated Share or Partition
If a NAS share or VTL partition is lost or damaged on the source system, you can recover it on the target
system using a received snapshot. When you recover a share or partition, it is recreated on the target
system just as it was at the point in time when the snapshot was saved.
To recover a replicated share or partition:
1. On the target system, select a received snapshot and perform a recover operation (see
Recovering a Partition on page 157
).
The share or partition is now available on the target system.
2. (Optional) Map your backup application to the recovered share or partition on the target system to
continue making backups.
3. When the source system is operating correctly again, choose one of the following actions:
l
Failback the share or partition to restore it on the original source system (see
Performing a Share or Partition Failback below
). Then, if necessary, map your backup application to
the restored share or partition on the original source system.
l
Continue to make backups to the recovered share or partition on the original target system. In
addition, set up replication to replicate the share or partition back to the original source system (see
Task Overview: Setting Up and Performing Replication on page 134
). In this scenario, the original
source system is now the target, and the original target system is now the source.
Task Overview: Performing a Share or Partition Failback
If a NAS share or VTL partition is lost or damaged on the source system, you can failback the share or
partition to the source system using a received snapshot on the target system. When you failback a share or
partition, it is restored on the source system just as it was at the point in time when the snapshot was saved.
To perform a share or partition failback:
1. On the original source system, add the original target system to the list of allowed replication sources
Adding a Replication Source on page 275
).
Note:
For the purposes of failback, the original source system is now acting as a target because it
will receive the snapshot from the original target system.
2. On the original target system, select a received snapshot and perform a failback operation pointing to
the original source system, and then recover the share or partition on the original source system (see
Performing a Failback For a Share on page 148
Performing a Failback For a Partition on page 158
).
The share or partition is now available on the original source system.
3. (Optional) If necessary, map your backup application to the restored share or partition on the original
source system.
