HP Application Recovery Manager software Integration guide (March 2008)

• If you select the Restore using Microsoft Virtual Disk Service option, you can restore
your data without using HP StorageWorks EVA SMI-S Agent.
Disadvantages
• It is not possible to perform another restore from the same backup.
• With the EVA intergration, this method of instant recovery changes the physical
location of the application production data. After instant recovery, a replica
becomes the source volume, therefore, the physical location of the original storage
changes. The application starts running on the physical disks that were used for
backup. Thus, if a replica to be restored belongs to a different disk group than
its source volume, the disk group of the replica becomes the disk group of the
source volume after instant recovery.
To perform this type of restore, select the Restore using Microsoft Virtual Disk Service
option or the Restore using HP StorageWorks EVA and Switch to the replica options
in the Application Recovery Manager GUI.
Copy of replica data with the source volume retained
With this method, a new copy from a replica is created in the same disk group in
which the source volume resides. When the copy is finished, a switch of disks between
the source and the new copy is performed. The old source volume is retained.
You can also select to retain the replica and thus enable to perform another restore
from this backup.
Advantages
• The old source volume is retained after restore.
• Disk group of the source volume is not changed after instant recovery.
• Another restore from the same backup is possible.
Disadvantages
• Restore is not as fast as with the "switch of disks" method.
• Physical location of the application production data changes.
To perform this type of restore, select the Copy replica data to the source location
option and leave selected the Retain source for forensics option in the Application
Recovery Manager GUI.
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