Backing Up Writers Data; Overview; Replica Types - HP Data Protector A.06.11 Integration Manual

Backing up writers data

Overview

To run backups and restores of the VSS writers and filesystems, you need to configure
the Data Protector Microsoft Volume Shadow Copy Service integration backup
specifications.
To configure the backup using the VSS integration, perform the following steps:
Configuration steps
1. Configure disk arrays, devices, media, and media pools needed for the backup.
See the online Help for instructions.
2. Create a Data Protector VSS backup specification specifying the VSS components
to back up, the media and devices to which you want your data to be backed
up, as well as the Data Protector backup options that define the behavior of your
backup or restore session.
If you are using Data Protector VSS to perform a zero downtime backup (ZDB) of the
MSDE Writer or Microsoft Exchange Server Writer, the Microsoft SQL Server or
Microsoft Exchange Server has to be running on the application system for a backup
to start.

Replica types

The two basic families of replicas available with Data Protector 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 or 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 can exist after the pair is split:
360 Integrating the Data Protector ZDB integrations and Microsoft Volume Shadow Copy Service