The management policy during a data set recall or recover is determined by the value set for &ACSENVIR in the management class ACS routine. The storage class ACS routine is then invoked to apply performance and availability criteria. The data class routine is not invoked. Additionally, during DFSMShsm RECALL processing, the storage group routine gets a different value for the &ACSENVIR field, depending on the data mover that is used. If DFSMSdss is the data mover, RECOVER is passed as the environment; if DFSMShsm is the data mover, RECALL is passed as the environment. Because of this, do not use the storage group ACS routine to test the value in &ACSENVIR for recall or recover, as this could yield inconsistent results. If the data set was transitioned before the migration, or if one or more class transitions were missed while the data set was migrated, then the &ACSENVIR field contains SPMGCLTR for all ACS routines.