MESSAGEDATASET is an optional parameter that allows you to specify the date and time used in the name of the fast replication command message data set. Specifying the date and time ensures that you can identify the message data set that corresponds with the FRBACKUP request or FRRECOV COPYPOOL request. If you don't specify the date and time with the MESSAGEDATASET parameter, DFSMShsm uses the date and time when the message data set name is generated.
For more information, refer to the FRBACKUP and the FRRECOV command descriptions in z/OS DFSMShsm Storage Administration.
