HP StorageWorks Storage Mirroring user's guide (T2558-96073, February 2008)
14 - 14
Use block checksum comparison/delta block transfer—Specify if you want the verification process to use a block
checksum comparison to determine which blocks are different. If this option is enabled, only those blocks (not the
entire files) that are different will be identified in the log and/or remirrored to the target.
3. Click OK to start the verification.
Scheduled verification
Verification can be scheduled to occur automatically at periodic intervals.
1. Right-click the connection on the right pane of the Management Console and select Connection Manager.
2. Select the Verify tab.
3. Specify when you want to start the initial verification. Select the immediate date and time by clicking Now, or enter a
specific
Date and Time. The down arrow next to Date displays a calendar allowing easy selection of any date. Time is
formatted for any AM or PM time.
4. Mark the Reverification Interval check box to repeat the verification process at the specified interval. Specify an amount
of time and choose minutes, hours, or days.
5. Select if you want to Remirror files to the Target automatically. When enabled, Storage Mirroring will verify the data,
generate a verification log, and remirror to the target any files that are different on the source. If disabled, Storage
Mirroring will verify the data and generate a verification log, but no files will be remirrored to the target.
6. If you are remirroring your files, you can specify Only if Source file is newer than Target copy so that only files that are
newer on the source than on the target are remirrored.
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 block checksum comparison to ensure proper
verification and remirroring.
NOTE: If you are using a database application, do not use the newer option unless you know for certain you need
it. With database applications, it is critical that all files, not just some of them that might be newer, get
mirrored.