• 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, SQL Server 2005, 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.
For detailed information on the VSS integration instant recovery concepts, see the
“Instant recovery” on page 391.
For detailed information on the general instant recovery concepts, see the HP Data
Protector zero downtime backup concepts guide and HP Data Protector zero downtime
backup administrator's guide.
Standard restore from tape
Data Protector offers two restore modes:
• component restore using the VSS service
• file restore using the DMA instead of VSS.
By default, Data Protector restores writer components using the VSS service.
Instant recovery is also available within the Data Protector VSS integration. This
functionality requires VDS hardware providers.
Restoring components
During the restore procedure, the Data Protector VSS integration coordinates
communication between Data Protector and the writers. In general, the restore flow
consists of the following phases: preparing for restore, restoring components, and
notifying the application writers that a restore has been completed. The restore
procedure of the VSS-aware writers consists of the following phases.
Integrating the Data Protector ZDB integrations and Microsoft Volume Shadow Copy Service338
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