Microsoft Exchange Server Writer Instant Recovery Specifics - HP Data Protector A.06.11 Integration Manual

• If you perform a backup in one mode and then the same backup in the other
mode, restore of the backup performed in the VSS compliant mode (the "switch
of disks" restore) will fail because the relationship between the S-VOL and its
P-VOL will be detected from the other backup performed in the resync mode.
This pair relationship should not be removed during restore and thus a switch
of the source volume with the replica cannot be performed.
To restore such a backup, perform one of the following prior to restore:
• Using the omnidbvss command, manually remove S-VOLs that were
• Set the variable OB2VSS_FORCE_INSTANT_RECOVERY in the omnirc
• If you perform restore using re-synchronization (the "copy of replica data"
restore) and the production source volume (P-VOL) is not presented on the
system, the restore session is aborted. This may happen after at least two
backup sessions are run using the same backup specification in different modes
and you run a "switch of disks" restore before a "copy of replica data" restore.
Under such circumstances, perform one of the following prior to restore:
• On the application system, manually present the P-VOL.
• Set the variable OB2VSS_FORCE_INSTANT_RECOVERY in the omnirc
The following restore considerations apply to restore using Disk Array XP Agent only:
• You cannot start another instant recovery session using the same disk on the
application system at the same time. A session can be started only after the
preceding session completes synchronization.
• After instant recovery, the restored filesystems are mounted to the drive letters as
were used at the time when backup was run. If these drive letters have other
filesystems mounted, these filesystems are automatically dismounted before instant
recovery, and the restored filesystems are mounted afterwards.

Microsoft Exchange Server writer instant recovery specifics

This section provides specific information on the point-in-time and roll-forward recovery
of Microsoft Exchange Server data.
With Microsoft Exchange Server 2003, you can restore a whole storage group or
individual stores only to the original location. With Microsoft Exchange Server 2007,
you can restore a whole storage group or individual stores to the original location
created during backups in resync mode.
file and enable the restore option Retain source for forensics in the GUI.
When this option is selected, Data Protector preserves the pair relationship
between the S-VOL and its P-VOL created in the backup with resync mode.
file.
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