You connect your physical tape library and the SMS logical tape library through the ISMF Define Tape Library Application. You can also use this application to identify a console for tape messages and the tape library's system connectivity.

Recommendation: Ensure that systems in an SMS complex requiring access to a system-managed tape library are explicitly defined with a system name in the SMS configuration, rather than implicitly as part of a system group. If a system-managed tape library is attached to a system group, rather than to an individual system, you cannot vary the library online and offline to the individual systems within the system group. The library must be online or offline to all systems in the group.