When using the DFSMSdss RESTORE command, the data set either exists or is deleted. The data set is recovered by restoring data from a backup copy to the target data set.

The data class ACS routine is not invoked, because either the data set already exists, or the characteristics of the data set are derived from the backup data set or DFSMSdss RESTORE job.

The storage class ACS routine is invoked to determine whether the data set is system-managed.

The management class ACS and storage group ACS routines are invoked only if the data set is system-managed and a storage class is assigned.