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

Backup with the Disk Array XP VSS and VDS hardware provider
There are two configuration modes available for the backup with the Disk Array XP
(XP) hardware provider:
• VSS compliant mode
When the XP provider is in VSS compliant mode, the source volume (P-VOL) and
its replica (S-VOL) are in simplex, unpaired state after backup. Therefore the
number of replicas (S-VOLs per P-VOL) rotated is not limited. Restore from a backup
in such a configuration is possible only by switching disks.
• Resync mode
When the XP provider is in the resync mode, the source volume (P-VOL) and its
replica (S-VOL) are in a suspended mirror relationship after backup. The maximum
number of replicas (S-VOLs per P-VOL) rotated is three, provided that the MU
range is 0-2 or 0, 1, 2. Restore from a backup in such a configuration is possible
only by re-synchronization of an S-VOL with its P-VOL.
Instant recovery
After ZDB to disk+tape or ZDB to disk, restore can be performed using instant
recovery. After ZDB to disk, instant recovery is the only possible restore method.
Backup session information is saved in the IDB, and the array-specific information
required for instant recovery is saved in the VSS database (VSSDB).
Instant recovery consists of two phases:
• An instant recovery session is started and the relevant data files are restored back
to the system.
• A writer performs the instant recovery, which is based on the restored data. In
case of MSDE and Microsoft Exchange Server 2003 and 2007 writers, database
recovery is performed automatically by the database engine.
IMPORTANT:
During instant recovery, the whole replica is restored. This means not only are the
originally selected backup objects restored, but the complete content of all the volume
groups that contained them. After the instant recovery, the content is returned to the
states when the replica was created.
HP Data Protector A.06.00 additional writers and HP StorageWorks Disk Array XP
support for Microsoft Volume Shadow Copy Service integration 69