DFSMShsm selects 3592 Model J tape drives for output in SMS and non-SMS tape environments. DFSMShsm performs all its allocation requests by using these standard dynamic allocation interfaces:

• Non-SMS-managed output tape selection: If multiple types of tape drives are installed that emulate the 3590 device type, you must define an esoteric name for each model that DFSMShsm uses. You must then define the esoteric names to DFSMShsm by using the SETSYS USERUNITTABLE(esoteric1:esoteric1,esoteric2:esoteric2,...) command. You must also specify the esoteric names as the unit names for the desired DFSMShsm functions. If a single type of tape drive is installed that emulates the 3590 device type, you do not have to define an esoteric name; instead, you can specify the 3590-1 generic name for the desired DFSMShsm functions.
• SMS-managed output tape selection: DFSMShsm performs a non-specific allocation; it then finds an acceptable output tape for the already allocated drive. If the 3590-1 generic name is used with multiple types of tape drives emulating the 3590 device type, see APAR OW57282 for further instructions.