Database Level Backup

For Exchange 2003/2007, you can back up entire databases or you can back up individual components of those databases.

The Exchange 2003/2007 database consists of Microsoft Information Store, which is comprised of storage groups, and transaction logs. The following shows the representation of an expanded Exchange 2003 disk:

To back up an entire Exchange 2003/2007 database, select the EXCH$host_name disk. To back up components of the database individually, select just those components.

The following describes how DPX backs up Exchange for base, incremental, and differential database level backups:

Base	Backs up the entire database, store, or storage group including the transaction logs, and truncates the transaction logs.
Incremental	Backs up the transaction logs and truncates the transaction logs.
Differential	Backs up the transaction logs and does not truncate them.

After an incremental backup, no further differential backups can be run until the next base backup.

DPX enforces a tape order restriction when performing Exchange 2003/2007 incremental backups. If you perform a base backup to tape A and then an incremental backup to tape B, you cannot then add another incremental backup of the Exchange 2003/2007 database to tape A; you must use tape B or a new tape. This feature assures that the base and incremental backups are restored in the proper order.

Note. Transaction logs are backed up only when circular logging is disabled. Circular logging is set from the Microsoft Exchange Administrator program or the Microsoft Exchange System Manager, external to DPX.