General example

 SETSYS USERUNITTABLE(es1, es2out:es2in, es3:es3)
If, for example, backup is restricted to es1 by using the SETSYS BACKUP(TAPE(es1)) command, migration is restricted to es2out by using the SETSYS TAPEMIGRATION(ML2TAPE(TAPE(es2out))) command, and spill is restricted to es3 by using the SETSYS SPILL(TAPE(es3)) command, then the following occurs: