Determining eligible data sets for migration

For non-SMS-managed data sets, the criteria for whether a data set is eligible for migration include the inactive age of the data set compared to the days value specified with the migration technique parameter of the ADDVOL command for the volume on which the data set resides. If the inactive age is larger than or equal to the days value, the data set becomes eligible for migration. If no days value has been specified on the ADDVOL command or the days value is equal to zero, DFSMShsm uses the value specified with the DAYS parameter of the SETSYS command. The days value, whether taken from the ADDVOL command or the DAYS parameter of the SETSYS command, is called the minimum migration age.