When a DFSMShsm function uses a tape drive to write output, DFSMShsm selects either an empty tape or a partially filled tape cartridge. For IBM® 3590 or 3592 tape drives that emulate IBM 3490 tape drives to write data to partial tapes, the CAPACITYMODE of the tape must match the CAPACITYMODE of the tape drive. If your installation has set the output esoteric to use CAPACITYMODE(EXTENDED) and only CAPACITYMODE(COMPATIBILITY) partial tapes are available, an empty tape is mounted.