HP StorageWorks Storage Mirroring Evaluation Guide (T2558-96326, April 2009)

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Performing failback
Failover occurred because the target was monitoring the source for a failure, and when a failure
occurred, the target stood in for the source. User and application requests that were directed to the
failed source are routed to the target. Failback is the process where the target releases the source
identity it assumed during failover. As a result, user and application requests are no longer routed to
the target, but back to the source.
If you keep your source identity the same, you must keep the source disconnected from the network
to avoid a name or IP address conflict with the target that is standing in for the source. You will be
able to reconnect it after failback. If desired, you can configure the source with a unique identity and
connect it to the network sooner. Whether your source identity is the same or unique (and thus if the
source is connected to the network) gives you the choice of performing failback before or after
restoring your data. For this evaluation, you are going to keep the source identity the same, in which
case you will be performing failback and then restoring your data. For details on restoring before
failback, see the User’s Guide.
1. From the Failover Control Center, select the target that is currently standing in for the failed
source.
2. Select the failed source and click Failback.
3. When prompted to determine if you want to continue monitoring the source, reconnect the
source network cables so that the source is reconnected to the network.
4. Once the source is back online, select Stop to discontinue monitoring the source.