Sony GY-8240FC Operation Manual page 64

Operations
Unload descrimination sequences
Normal Unload
Note
If EOD unloading is not possible, for example, as when
the EOD could not be discriminated during a recovery
operation, the DIT will be written at the tape top.
Normal Unload
18 (E)
UNLOAD command or button
Rec Inhibit?
OFF
Normal
Unload Mode?
Fast
Fast Unload?
Normal
Halfway area?
Yes
Fast Unload Half
MOUNT command (SCSI/PSC)
Rec Inhibit?
OFF
OFF
Fast bit of CDB?
ON
Half bit of CDB?
OFF
Fast Unload?
Normal
Tape position?
Close to EOD
Fast Unload EOD
ON
Same type of unload as
previous is performed
TOP
No
Close to
TOP
Tape position?
Close to EOD
Fast Unload EOD Fast Unload TOP
ON
Same type of unload as
previous is performed.
ON
No
Halfway area?
TOP
Close to
TOP
Fast Unload TOP Fast Unload Half
Yes