HP StorageWorks Application Recovery Manager Administrator's Guide (T4395-96004, February 2008)

Introduction
Concepts
Chapter 1 13
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.
If you want this type of restore to be performed, select the Copy replica
data to the source volume option and leave selected the Retain
source for forensics option in the Application Recovery Manager
GUI.
Copy of replica data with the source volume not retained With
this method, the source volume is directly overwritten by the replica. The
old source volume is not retained and if the restore session fails, the
original application data residing on the source volumes is lost.
You can select to retain the replica and thus enable to perform another
restore from this backup.
Advantages • Disk group of the source volume is not changed after instant recovery.
• Physical location of the application production data remains the
same.
• Another restore from the same backup is possible.
Disadvantages • Restore is not as fast as with the "switch of disks" method.
• The "old" source volume is lost during restore.
If you want this type of restore to be performed, select the Copy replica
data to the source volume option and deselect the Retain source
for forensics option in the Application Recovery Manager GUI.