HP StorageWorks Storage Mirroring Recover User's Guide (T5437-96008, November 2009)

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● Target service shutdown—If the target service is stopped and restarted, there
could have been data in the target queue when the service was stopped. To
prevent any loss of data, the Storage Mirroring service will attempt to persist to
disk important target connection information (such as the source and target IP
addresses for the connection, various target queue information, the last
acknowledged operation, data in memory moved to disk, and so on) before the
service is stopped. If Storage Mirroring Recover is able to successfully persist this
information, when the Storage Mirroring service on the target is restarted, Storage
Mirroring Recover will pick up where it left off, without requiring an auto-
disconnect, auto-reconnect, or auto-remirror. If Storage Mirroring Recover cannot
successfully persist this information prior to the restart (for example, a server crash
or power failure where the target service cannot shutdown gracefully), the source
will auto-reconnect when the target is available, and if configured, Storage
Mirroring Recover will auto-remirror. The remirror re-establishes the target baseline
to ensure data integrity, so disabling auto-remirror is not advised.
Note:
If you are experiencing frequent auto-disconnects, you may want to
increase the amount of disk space on the volume where the Storage
Mirroring Recover queue is located or move the disk queue to a larger
volume.
If you have changed data on the target while not failed over, for example if
you were testing data on the target, Storage Mirroring Recover is unaware
of the target data changes. You must manually remirror your data from the
source to the target, overwriting the target data changes that you caused,
to ensure data integrity between your source and target.
Reconnecting automatically
Use the following steps to configure automatic reconnections.
1. Open the Replication Console and right-click the server on the left pane of the
Replication Console.
2. Select Properties and select the Setup tab.