Depending on the pool configurations you create, you might have data that matches the criteria for more than one pool configuration. For example, if you configure one pool to accept data from a group called "Accounting," and you configure another pool to accept data from all full backups, Backup has to determine to which pool a full backup for the Accounting group is written. Backup uses the following pool selection criteria:
Group (highest precedence)
Client
Save set
Level (lowest precedence)
When data matches the attributes for two pools, for example, Group and Level, the pool data is written to the pool specified in the Group attribute. In the example where the data matched the criteria for two pools, the one configured to accept data from the Accounting group and the other configured to accept data from all full backups, the data is routed to the pool that accepts data from the Accounting group.