How to share robotic libraries without using the Shared Storage Option
You can share robotic tape libraries among multiple NetBackup media servers by using any of the following methods:
Shared library support
NetBackup allows different drives within the same robotic library to be configured on different media servers. This capability is termed shared library support. Robot types that support shared library are ACS and TLD.
Partitioned libraries
Some robot vendors also let you partition libraries. One partitioned view of the robotic library includes one set of drives, while the other view has a different set of drives in the library. Partitions let two robotic control daemons on different control hosts manage the robotic library - possibly each for a different NetBackup primary and media server environment.
These capabilities are not related to the Shared Storage Option and should not be confused with the Shared Storage Option.