Cannot mount database if you are backing up another database in the same storage group

When you try to mount a database in Microsoft Exchange Server 2003 or in Microsoft Exchange 2000 Server, the database does not mount, and you receive the following error message: In addition, the following event is generated in the Application event log.

This behavior can occur if the storage group that this database belongs to has multiple databases (either mailbox stores or public stores) and if one of those databases is being backed up at the time you try to mount this database.

Ensure that none of the other databases in the storage group are being backed up, and then try to mount the database. Alternatively, wait for the backup of the other database in the storage group to finish before you try to mount this database.

This behavior is by design. It is not possible to mount a database in a storage group while you are backing up another database in that same storage group.

If you run isinteg against the server, you obtain a list of all mailbox stores and their corresponding status. Isinteg reports each online store in the affected storage group that exists in a "Backup" state. If your backup is not progressing, and you have to stop the backup process, follow these steps to try to stop the backup process:

1. Stop the backup from the backup software. If the backup does not stop, go to step 2.
2. Stop the backup services by using the service control manager (Services.msc). If the backup does not stop, go to step 3.
3. Stop the backup processes by using Task Manager.

Note Isinteg may still report the stores in a "Backup" state for up to 10 minutes.