Guidelines for Protecting Data using HP StorageWorks Storage Mirroring with Volume Shadow Copy Service (VSS) (T2558-96332, March 2009)

4. Right-click the source machine and select New, Replication Set. Enter a name for the replication
set.
5. Select the portion of the VSS volume that you want to protect (for instance, select the entire volume
for a file server, or select only the data files for a database application).
6. Deselect the System Volume Information folder.
7. Right-click the replication set name and select Save to save the replication set.
8. Drag and drop the replication set onto the target. The Connection Manager dialog box opens.
9. The Source Server, Target Server, Replication Set, and Route fields will automatically be populated.
If you have multiple IP addresses on your target, verify the Route field is set to the correct network
path. (For more information about connecting a source and target, see the HP StorageWorks
Storage Mirroring User's Guide.)
10. Select One to One to map the replication set data from the source to an identical volume/directory
structure on the target.
11. If data from a transactional application such as a database is being protected on the source, the
recommended practice is to move or delete orphan files on the target. If desired, configure the
connection so that orphan files on the target are deleted or moved. See the HP StorageWorks
Storage Mirroring User's Guide for more information about orphan files.
12. On the Mirroring tab, select the type of mirror, either Full or File Differences, to perform.
NOTE:
If the target has been previously mirrored to or restored, select File differences with the Use block
checksum option so that only the changed data is sent across the network.
13. Click Connect to start the mirror and replication processes.
Your data is protected after the mirror is complete and the Mirror Status has changed to Idle.
Set up snapshot strategy
If you are using either the VSS on Source and Target or the VSS with Transactional Applications
configuration, you can configure Storage Mirroring and VSS to create a data protection/snapshot
solution.
From the following options, select the snapshot strategy that best fits your data availability needs:
• Asynchronous Snapshots: Using this strategy, VSS takes snapshots of the data being protected on
both the source and target servers, but the data contained in each snapshot may not match exactly
due to the fact that recent data changes on the source may not have had time to replicate to the
target. This strategy is useful for protecting non-database data where minor differences in the
version of the files being protected would not be significant (for example, protecting a public
shared folder on a file server where multiple people access the same share).
An advantage of using this strategy is that the built-in snapshot scheduling mechanism in VSS can
be used without any modifications.
NOTE:
This strategy is not recommended for databases.
• Synchronous Snapshots: Using this strategy, a snapshot is taken on the source machine, and a
snapshot is taken on the target of the source data at the same given point. Unlike asynchronous
Sample Implementation16