If you want to specify the COLD and/or FORMAT initialization options (both of which result in a cold start of JES2), you must IPL the system before you issue the MVS™ START command, unless you stopped the previous JES2 with a $P JES2 operator command. Implement a cold start with caution because it results in the re-initialization of all JES2 job and output queues. This means all job queue entries and job output elements are cleared and formatted.

If you specify the FORMAT initialization option, JES2 formats all existing spool volumes. Otherwise, JES2 formats any spool volumes it determines are unformatted. No other member in a MAS configuration can be active during a cold start or JES2 will terminate with an error message.

You invoke one of the remaining initialization processes as a result of specifying the WARM initialization option without the FORMAT option. If you specify the FORMAT option, JES2 automatically performs a cold start.