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

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Failing back a full-server workload
After your target has failed over and becomes your source, you can stay with that
configuration long term. However, in some instances, it may be necessary or desired to
go back to using the original hardware after you have failed over. Use the following
process to failback to your original (or other) hardware.
1. Because your new source is on the network, you must make sure your original
source is unique on the network to avoid name and IP address conflicts. You have
several options available for achieving this.
● Reinstall Windows using unique server information. This may be the best
option if your original source was a domain controller or running a name-
specific application like Exchange.
● Run a utility like Microsoft SysPrep to modify SIDs (security identifiers), IP
addresses, and the server name.
● Manually make the original source unique by modifying IP addresses and the
server name. If your original source was a domain controller, you must also
modify the SIDs.
2. Establish protection from your new source to your original source using the same
process as when you protected your original source.
3. When the protection has been established from your new source to your original
source, initiate failover.
Once failover has completed, you will be back to your original hardware.