JES2 transmits spin data sets separately from regular data sets. The SYSOUT receiver receives spin data sets as unique “jobs”; any later spin data sets or regular data sets cause the receiver to create a new job.

The SYSOUT receiver builds peripheral data definition blocks for the spin data sets in separate spin input/output tables, and the output processor builds separate spin output groups for them. If a regular (non-spin) data set has a copy count of 2 and the job has a copy count of 3, the data set should print 6 times. If a spin data set has a copy count of 2 and the job has a copy count of 3, the data set prints twice; job copy count does not apply to spin data sets.