Defining the tape sessions

Tape sessions are defined by using ...-CONTROL=*BY-TAPE-SESSIONS(START-TIME=<time>) to specify a time at which the first tape session is to begin each day.
When START-TIME=*IMMEDIATELY, tape accesses are permitted after the HSMS statement has been entered or the HSMS session has been started. When PERIOD=0, they are permitted from the start of the tape session to the end of the day.

*BY-TAPE-SESSIONS(PERIOD=<minutes>) specifies how many minutes are to pass between the start of two tape sessions.