For non-SMS-managed data sets, DFSMShsm deletes those data sets
that have passed their expiration date. For non-VSAM data sets this
would be the expiration date in the data sets' VTOC entries and
for VSAM data sets this would be the expiration date in the data sets'
catalog entries. For these data sets, the EXPIREDDATASETS parameter
of the SETSYS command controls whether the data sets are deleted.
Note: For multivolume non-VSAM data sets, DFSMShsm looks at the
VTOC of the first volume.