HP Storage Mirroring Software User Manual
Page 534
Connections
Page 533 of 677
l
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
is located or move the disk
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.