System groups in an SMS configuration

The systems that share the SMS configuration may be defined in one of two ways:

As an individual system (the name of the system is known to SMS)
As part of a system group (only the name of the group is known to SMS). There can be a maximum of 32 systems, system-group names, or both sharing the SMS configuration.

Recommendation: Although a system group may be defined to SMS, define all systems connected to a tape library as individual systems. If the tape library is connected to a system group, the installation loses the ability to vary the library online or offline to the individual systems that comprise the group. A VARY SMS,LIBRARY command directed to a system group causes the library to be varied online or offline to all the individual systems in the group. There is no way to direct a VARY SMS,LIBRARY command to an individual system that is part of the system group.