V11 SP8

Configuring the Back Up of Locked Exchange Databases

Applies to: Exchange 2007

When Volume Copy Shadow Service (VSS) is enabled, write operations on data that is being backed up are allowed to continue while the backup runs.

During a VSS backup, free space is required on the volume for the shadow copy. The size of the free space is determined by the duration of the backup and the volume of changes that are made to the data objects (that is, files and databases) that are being backed up. VSS snapshots capture and copy disk blocks that are changed by other processes while the backup for a particular object is running. If the backup runs for a longer time, or there is a lot of disk activity (changes to files and databases), then VSS copies more data blocks that require more disk space.

You can enable VSS for backups of local volumes in both clustered and non-clustered environments. If a shadow copy of the data is not created, a traditional backup is performed, and a message appears in the Event Viewer. A consistency check of the database integrity is performed prior to backing up the data. If the integrity check fails, then the backup fails.

Before You Begin

Make sure that the Exchange database is mounted.


  1. From the CommCell Console, expand Client Computers > client > Exchange Database.
  2. Right-click Exchange Database, and then click Properties.

    The Exchange Database Properties dialog box appears.

  3. Select the Use VSS check box.
  4. Click OK.