Backup operation does not protect all the AlwaysOn Databases

Article ID: 54167

Article Type: Troubleshooting

Last Modified:

The backup operation skips the AlwaysOn databases that are a part of an instance on a replica. The replica is protected separately and is not protected as part of an Availability Group client.


The backup operation that is running on the AlwaysOn Databases does not protect all the databases. One of the following events is displayed in the Event Viewer:

  • Skipping database [AlwaysOn\_DataBase]. Not a preferred replica to run backup
  • Skipping database [AlwaysOn\_ DataBase]. Only BACKUP LOG is fully supported on secondary replicas. BACKUP DATABASE supports only copy-only full backups of the database, files, or file groups. Differential backups are not supported on secondary replicas


The backup operation that is running against the AlwaysOn databases skips all the databases for one of the following reasons:


Set the primary replica as the preferred backup replica, and run the backup operation on the preferred replica.
1 Commvault Way, Tinton Falls, NJ 07724 Sitemap | Legal Notices | Trademarks | Privacy Policy
Copyright © 2022 Commvault | All Rights Reserved.