Seagate STT8000A - Manual (Page 46)

Chapter 5 ATAPI Interface
Page 38 STT8000A Product Manual
ATAPI interface
The following table lists the ATAPI interface commands for the drive. In this table,
DSC restrictive means that the host should wait for DSC to be set before issuing the
command for minimum IDE bus overhead. Note that all ATAPI commands are 12
bytes in length. The command descriptions show only the first 6 or 10 bytes of these
commands, even though the commands are actually 12 bytes long.
Note. Unless otherwise stated, all reserved and unsupported fields are not verified
when the drive accepts a command. These fields are filled with 00s for
future compatibility.
Code DSC
Restrictive Command Comments
00h Y TEST UNIT
READY Not DSC restrictive on some other drives.
01h Y REWIND
03h N REQUEST
SENSE Null status if DSC not set.
08h buffer READ Delay occurs if first READ is not READ 0 blocks.
0Ah buffer WRITE Write 0 not required to initialize DSC.
10h Y WRITE
FILEMARK Flush always. WFM 0 to flush.
11h Y SPACE Space forward/reverse Filemarks and space to
EOD only.
12h N INQUIRY DSC not affected.
15h — MODE
SELECT Select speed, FDP, page 2B updates only.
19h Y ERASE Constitutes a logical erase; accepted at BOP0/1
or EOD only.
1Ah — MODE
SENSE
1Bh Y LOAD/UNL
OAD UNLOAD to make not ready; LOAD to return to
Ready. LOAD w/Retension any time. (All LOADS
imply REWIND and select partition 0.)
2Bh Y LOCATE Locates logically only; can also select partition.
34h Y READ
POSITION Also used to wait for previous command done.
3Bh — WRITE
BUFFER Use for download only. Drive must be "unloaded".
4Ch — LOG
SELECT Resets Error Counts.
4Dh — LOG
SENSE Contains Error Counts (WRITE and READ) and
tape capacity.