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

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3. Verify that Perform Remirror After Auto-Reconnect is selected to initiate an
auto-remirror after an auto-reconnect.
Note:
If auto-remirror is disabled and an auto-reconnect occurs, the transmission
state of the connection will remain pending after the reconnect until a
mirror is started manually.
4. Verify that Mirror only Changed Files on Source Reboot is selected to use the
Windows NTFSchange journal to track file changes. When this option is enabled,
if the source is rebooted, only the files identified in the change journal will be
remirrored to the target. This setting helps improve mirror times.
5. Specify the type of mirror that you wish to perform.
● Differences with Checksum—Any file that is different on the source and
target based on date, time, and/or size is flagged as different. The mirror then
performs a checksum comparison on the flagged files and only sends those
blocks that are different.
● Differences with no Checksum—Any file that is different on the source and
target based on date, time, and/or size is sent to the target.
● Send data only if Source is newer than Target—Only those files that are
newer on the source are sent to the target.
● Full—All files are sent to the target.
Note:
Database applications may update files without changing the date, time,
or file size. Therefore, if you are using database applications, you should
use the Differences with checksum or Full option.
Stopping, starting, pausing, or resuming mirroring contains a comparison
of how the file difference remirror settings work together, as well as how
they work with the global checksum setting on the Source tab of the
Server Properties.
5. Click OK to save the settings.