Requirements for a grouped backup
Certain requirements must be met for a grouped backup to be performed. If any of the following requirements are not met, a standard backup is performed:
All backup operations must be full backups. Differential backups are not supported.
The master database cannot be included in a grouped backup.
The same policy must be specified for each backup operation in the group.
The same NetBackup server must be specified for each backup operation in the group.
The simplest way to use grouped backup is to select multiple databases using the Backup Microsoft SQL Server Objects dialog box. If the conditions described apply, then the selected databases are backed up as a group.