In the DFSMShsm environment, certain commands must follow a particular sequence to ensure that the command does not malfunction or fail. The following table lists these sequences:
| Issue This Command | Before This Command |
| ADDVOL | DEFINE POOL or DEFINE VOLUMEPOOL |
| DEFINE DUMPCLASS | ADDVOL with either AUTODUMP or DUMPCLASS parameters |
| SETSYS JES2 or JES3 | ADDVOL commands |
| SETSYS SMALLDATASETPACKING | ADDVOL with SDSP |
| SETSYS SYSOUT | SETSYS ACTLOGTYPE |
| SETSYS UNITNAME | SETSYS CDSVERSIONBACKUP |
| SETSYS USERUNITTABLE | ADDVOL |
| ARECOVERUNITNAME(unittype) | |
| DEFINE with a DUMPCLASS(unittype) | |
| ABACKUP | |
| ARECOVER | |
| SETSYS BACKUP(tape) | |
| SETSYS CDSVERSIONBACKUP | |
| SETSYS MIGUNITNAME | |
| SETSYS RECYCLEOUTPUT | |
| SETSYS SPILL | |
| SETSYS TAPEMIGRATION | |
| SETSYS UNITNAME |