To have SMS use RACF® for retrieving default values from the DFP segment of user and group profiles, your installation must specify ACSDEFAULTS=YES in the IGDSMSmm member of SYS1.PARMLIB. For more information, see z/OS DFSMSdfp Storage Administration.

After invoking RACF to determine the owner (user or group) of an SMS-managed data set, DFP again invokes RACF to retrieve the default values for DATAAPPL, DATACLAS, MGMTCLAS, and STORCLAS from the DFP segment of the owner's RACF profile. DFP uses these values as input to ACS routines during allocation of the data set.