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Quantum Audio Travan 40 Tape Drive STT3401A User Manual

Page 42

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Chapter 5

ATAPI Interface

Page 34

Seagate Travan 40 Product Manual

LOAD/UNLOAD Command (EOT, RET and LOA Bits)

Initial State

EOT

RET

LOA

Action

Final State

Loaded, Ready

0

0

0

Position to BOT and set Unload
status

Unloaded, Not Ready

Loaded, Ready

0

0

1

Position to BOT

Ready

Loaded, Ready

0

1

0

Retension, Position to BOT and set
Unload status

Unloaded, Not Ready

Loaded, Ready

0

1

1

Retension and Position to BOT

Ready

Loaded, Ready

1

0

0

Set Unload status

Unloaded, Not Ready

X

1

X

1

Check Condition, Illegal Request

Same as Initial

Loaded, Ready

1

1

0

Retension and set Unload status

Unloaded, Not Ready

Unloaded, NR

X

X

0

Check Condition, Not Ready

Unloaded, Not Ready

Unloaded, NR

0

0

1

Load cartridge and Position to BOT

Ready

Unloaded, NR

0

1

1

Load cartridge, Retension and
Position to BOT

Ready

Additional Sense Bits: CNI—Cartridge Not in Place, WP—Cartridge Write
Protected, EOM—End-of-Media, BOM—Beginning-Of-Media.

NOTE: Log Select page 32h (byte 17h bit 4) defines the action of the UNLOAD

command. If the bit is 1, the Unload command will eject the cartridge. If the
bit is 0, the Eject button must be pushed to eject the cartridge.

NOTE: If a cartridge has been ejected but not removed from the drive, a LOAD

command will draw the cartridge into the drive.

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