DFSMShsm uses the volume serial number of MIGRAT for data sets in the computing system catalog to identify migrated data sets. Therefore, you must not define any volume with a volume serial number of MIGRAT. If you use MIGRAT as a volume serial number, data access failures on the volume can result.

When DFSMShsm needs a scratch tape, the operator receives a mount message for a volume serial number of PRIVAT, which is the standard name for a private scratch tape volume. Therefore, you should not define any tape volumes with a volume serial number of PRIVAT. If you use PRIVAT as a volume serial number, the volume might never be mounted and if it is, data access failures can result.