Sony SDX-700C, Product Specifications Manual

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LOAD/UNLOAD 6.Command Specification
SONY AIT-3 drive SDX-700 series Ver.2.1 6-9
When the drive receives the UNLOAD, it updates the System area of whichever partition on the tape is currently
active. The tape is then rewound to BOM and ejected. The operator must reload the drive manually. If, however, the
drive has previously received a PREVENT MEDIA REMOVAL (with prevent bit set) command, the tape is retained in
the drive. A subsequent LOAD command will load and position the tape at BOP ZERO. If an UNLOAD was sent
instead, the drive would return NOT READY and the tape would remain within the drive. In this case, the drive
requires a PREVENT ALLOW MEDIA REMOVAL (with prevent bit clear) command before an UNLOAD will eject the
tape.
Note: While the PREVENT MEDIA REMOVAL is in effect, the Front Panel EJECT button is completely disabled.
If the cassette is unloaded but has not been ejected from the drive because of moisture detection, then a subsequent
UNLOAD will cause the tape to ejected from the drive. All commands except INQUIRY, REQUEST SENSE and
READ BLOCK LIMITS will return a CHECK CONDITION status with a HARDWARE ERROR sense key set. The
tape may also be ejected via the Front Panel EJECT button.
If no cassette is in drive, both LOAD and UNLOAD will return a CHECK CONDITION status with NOT READY sense
key set