z/OS DFSMS provides device allocation and media management in the 3494 and 3584 automated or manual tape library environments for encryption-capable TS1120 tape drives. This full support is required when encryption-capable TS1120 tape drives are installed in an IBM tape library environment. Encryption-capable TS1120 tape drives can coexist in the same library with TS1120 drives that are not encryption-capable, as well as 3950 Model B1x, 3590 Model E1x, 3590 Model H1x and 3592 Model J1A drives. However, depending on the library type and model, certain device types may only be supported in certain libraries. For example, the IBM 3584 automated tape library supports only the 3592 family of tape drives.

Inside an IBM tape library, only 3590 Model B1x emulation is supported. The system-managed tape library support recognizes the device as its real device type instead of its emulated device type; this enables "real" and emulated 3590 Model B1x tape drives to coexist and be properly managed in the same IBM tape library.

To request WORM media in a system-managed tape library environment and to ensure that WORM media is only used when explicitly requested, if a WORM scratch volume is to be used, media types MEDIA6, MEDIA8, or MEDIA10 must be explicitly specified through data class. For the 3592 Model E05, if a media type is not specified through data class, MEDIA9 is the primary scratch media type, MEDIA5 is the alternate scratch media type if there are no MEDIA9 scratch volumes available, and MEDIA7 is the second alternate scratch media if there are no MEDIA9 or MEDIA5 scratch volumes available.

Before using the new encryption-capable TS1120 tape drive, ensure that all existing 3592 Model J1A and E05 drives in the library are upgraded to recognize and enable cartridges formatted for EFMT2 or EEFMT2 to be relabelled/reused on the 3592 Model J1A and E05 drives. Otherwise, job failures may occur with a drive with the incorrect microcode load being allocated.