HP Data Protector A.06.00 additional writers and HP StorageWorks Disk Array XP support for Microsoft Volume Shadow Copy Service integration

Limitations
• Instant recovery cannot be performed after a point-in-time recovery. To be able
to perform instant recovery, you first need to run backup with the instant recovery
options set.
• The number of replicas available for instant recovery is limited by Number of
replicas rotated, which sets the size of the replica set. You can view these replicas
in the GUI, in the Instant Recovery context by expanding Restore Sessions. Replicas
are identified by the backup specification name and the session ID. Other
information, such as time when a particular replica was created, is also provided.
Alternately, you can use the omnidbvss command to list sessions. For information
about omnidbvss, see the HP Data Protector command line interface reference.
• Concurrent instant recovery sessions utilizing the same backup system or the same
application system are not supported. Restores utilizing the same backup system
or the same application system must be performed serially.
• For instant recovery of Exchange Server 2007 data to a different location, the
Microsoft Virtual Disk Service and HP StorageWorks Disk Array XP instant recovery
options are not available.
For additional Exchange Server 2007 writer limitations, see “Microsoft Exchange
Server 2007 instant recovery prerequisites and limitations” on page 121.
HP StorageWorks Disk Array XP considerations
• Instant recovery depends on the XP VSS hardware provider mode which was
used during backup. If the VSS compliant mode was used, you can restore your
data only using VDS. If the resync mode was used, you can restore your data
only using SSEA.
• Changing the selected XP VSS hardware provider mode between different backup
sessions using the same backup specification is not recommended. If the mode
is changed while the replica rotation count is set to more than 1, instant recovery
will fail in the following situations:
• 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
created during backups in resync mode.
HP Data Protector A.06.00 additional writers and HP StorageWorks Disk Array XP
support for Microsoft Volume Shadow Copy Service integration 119