Converting from 3480 to 3490 devices in a nonlibrary environment

If the system support for 3490 devices is installed, DFSMShsm converts the following generic unit names to the special esoteric names provided by the system. The esoteric unit name can be for a device other than the 3480, 3480X, or 3490.

3480 (used for output) is changed to SYS3480R for input drive selection. SYS3480R is a special esoteric name that is associated with all 3480, 3480X, and 3490 devices. Any device in this esoteric is capable of reading a cartridge written by a 3480 device.
3480X (used for output) is changed to SYS348XR for input drive selection. SYS348XR is a special esoteric name that is associated with all 3480X and 3490 devices. Any device in this esoteric is capable of reading a cartridge written by a 3480X device.

In a JES3 system, you need to define the SYS3480R and SYS348XR esoterics during JES3 initialization. SMS allocation performs this conversion in a library environment. A 3490 device can read data written on 3480, 3480X, or 3490 devices. A 3480X device can read data written on 3480 or 3480X devices.