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

• Differential - similar as incremental backup, but the transaction logs are not
truncated. Requires Service Pack 1.
• Copy - a Full backup, but the logs are not truncated. This type of backup is not
intended for use in recovering failed systems.
Limitations
• A combination of VSS snapshot backups and non–VSS backups (for example,
incremental stream backups) is not supported.
• You can back up only the whole server or full storage groups. Single stores cannot
be backed up.
• Circular logging must be disabled; otherwise, only full backup recovery is possible.
• With Exchange Server 2003, only one VSS backup session can be running on
the same application system at once. With Exchange Server 2007, only one VSS
backup session backing up a specific storage group can be running on the same
application system at once. Consequently, if you start such a backup session
while another one is in progress, the latter waits until the first one finishes.
Recommendations
• With the HP StorageWorks EVA provider, an Exchange storage group should
not reside on more than four source volumes. However, the recommended
configuration is that transaction logs reside on one source volume and the stores
on another source volume. This configuration enables you to perform a rollforward
recovery if only the stores are lost.
Create one backup specification for each storage group and schedule them in a
row.
Rollforward recovery
Rollforward of a storage group can be performed with incremental or differential
ZDB to tape of the same objects as were backed up in instant recovery enabled
sessions (ZDB to disk or ZDB to disk + tape). If the logs are still available on disk,
the restore of last full backup will roll forward the store to the latest state (recorded
in the logs).
Writer stabilization
After each Microsoft Exchange Server Writer backup, Data Protector by default waits
10 minutes for Microsoft Exchange Server Writer to stabilize. You can disable this
option or you can reduce the waiting time using the
OB2VSS_EXCHANGE_WRITER_STABILIZATION omnirc variable.
Integrating the Data Protector ZDB integrations and Microsoft Volume Shadow Copy Service100