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

Backup
Overview
Chapter 336
Overview
To run backups and restores of the VSS writers and filesystems, you
need to configure the Application Recovery Manager backup
specifications.
To configure the backup, perform the following steps:
Configuration
Steps
1. Configure disk arrays needed for the backup.
2. Create an Application Recovery Manager VSS backup specification
specifying the components to back up, as well as the Application
Recovery Manager backup options that define the behavior of your
backup or restore session.
The Microsoft SQL Server or Microsoft Exchange Server have to be
running on the application system for a backup to start.
Replica Types
The two basic families of replicas available with Application Recovery
Manager are split mirror and snapshot.
Split Mirror Replica
This type of replica is produced using mirroring technology, provided by
HP StorageWorks Disk Array XP. Mirroring technology allows a
duplicate (a mirror) of the filesystem/application data to be created
during normal application use. When a replica is required, a disk from
the S-VOL host group is first synchronized with the (P-VOL) and after
that the pair is split leaving a fixed copy, or an independent split mirror
replica of the source volume. Depending on the configuration mode set in
the VSS hardware provider, two types of mirror replicas are possible
after the pair is split:
If the provider is in the VSS compliant mode, the replica is independent
copy or clone of the source volume with no pair relationship between the
replica and its source volume.
If the provider is in the resync mode, the replica and its source volume
are in the suspended mirror relationship enabling restore of such replica
only by re-synchronization the replica with its source volume.