For your SMS-managed data sets, you must establish a DFSMShsm environment that coordinates the activities of both DFSMShsm and SMS. You can define your storage groups and management classes at one time and can modify the appropriate attributes for DFSMShsm management of data sets at another time.

The storage group contains one attribute that applies to all DFSMShsm functions, the status attribute. DFSMShsm can process volumes in storage groups having a status of ENABLE, DISNEW (disable new for new data set allocations), or QUINEW (quiesce new for new data set allocations). The other status attributes QUIALL (quiesce for all allocations), DISALL (disable all for all data set allocations), and NOTCON (not connected) prevent DFSMShsm from processing any volumes in the storage group so designated. Refer to z/OS DFSMSdfp Storage Administration for an explanation of the status attribute and how to define storage groups.