When you use multiple DFSMSrmm systems, they can share the same control data set. You can use the DFSMSrmm ISPF dialog and RMM TSO subcommands to display all information that has been recorded in the control data set. When, however, you share a DFSMSrmm control data set where at least one system does not support system-managed tape libraries, there are restrictions on using the RMM TSO subcommands from DFSMSrmm on a non-system-managed tape system to add and change information in the control data set for system managed tape volumes.

Also see Running DFSMSrmm with system-managed tape libraries for additional considerations.