When a multivolume physical sequential DASD data set is opened for input, RACF® does not require that each volume on which the data set resides be defined in the data set profile.

When an existing multivolume physical sequential data set is opened for output, a RACF-protection consistency check is performed. All volumes of the data set that are processed by end-of-volume (when a volume switch occurs) must indicate the same RACF-protection status as the first volume opened. That is, if the first volume is RACF-protected (the DSCB indicator is on and the volume is defined in the data set profile), succeeding volumes must be RACF-protected as part of the same profile. If the first volume is not RACF-protected, succeeding volumes must not be RACF-protected.

For multivolume non-physical sequential DASD data sets, RACF performs authorization checking for each volume on which the data set resides.