Storage unit selection criteria within a group

The storage unit selection criteria determines the order in which storage units are selected within a storage unit group.

The only difference between the selection criteria options is the order in which the storage units are selected.

Choose from one of the following selection criteria.

Selection	Description
Prioritized	If the Prioritized option is selected, NetBackup chooses the next available storage unit in the list. Prioritized is the default selection. If a storage unit is unavailable, NetBackup examines the next storage unit until it finds one that is available.
Failover	If the Failover option is selected, when a job must queue for a storage unit, the job queues rather than try another storage unit in the group.
Round robin	If the Round robin option is selected, NetBackup chooses the least recently selected storage unit in the list as each new job is started. If a storage unit is unavailable, NetBackup examines the next storage unit until it finds one that is available.
Media server load balancing	If the Media server load balancing option is selected, NetBackup selects a storage unit based on a capacity-managed approach. In this way, NetBackup avoids sending jobs to busy media servers. If a storage unit is unavailable, NetBackup examines the next storage unit until it finds one that is available. See Media server load balancing.

A queue can form for a storage unit if the storage unit is unavailable.

The following are some reasons why a storage unit can be considered unavailable:

The storage unit is busy.
The storage unit is down.
The storage unit is out of media.
The storage unit has no available space.
The storage unit has reached the Maximum concurrent jobs setting.
See Maximum concurrent jobs storage unit setting.