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

Introduction
Concepts
Chapter 112
perform another instant recovery from that replica. For more
information about the switch method, see “Switch of disks” on
page 12.
In case of XP integration, this type of restore can be performed if a
backup was created with the XP provider in the VSS compliant mode.
• Using a disk array integration (HP StorageWorks EVA or HP
StorageWorks Disk Array XP)
Restore Using HP StorageWorks EVA
Depending on the instant recovery options you select in the Application
Recovery Manager GUI, instant recovery can be performed in three
ways:
Switch of disks With this method, the source volume is unpresented
and the target volume (replica) is presented in the place of the source
volume. You can select to retain the old source volume. However, you
cannot retain the replica and perform another restore from this backup.
Advantages •Restore is very fast.
• The old source volume can be retained after restore.
•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 integration, 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.
If you want this type of restore to be performed, 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.