DFSMShsm selects 3592 Model E05 tape drives for output in SMS and non-SMS tape environments. DFSMShsm performs all of its allocation requests through 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, or there is a mix of 3592 Model E05 and J1A drives and the E05 drives are set-up to use EFMT1, 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 you use a 3590-1 generic that contains mixed devices, see APAR OW57282 for information about disabling the 3590-1 mixed device checking and the corresponding ARC0030I failure message.