19 Aug
2016
19 Aug
'16
11:08 a.m.
On 08/19/2016 09:24 AM, js at cimmeri.com wrote:
Where might I find information on how to form SCSI
command data
blocks so as to try the above commands? I sent just an "01" to the
TEAC MT-2ST, and it did rewind.. but did not react to any of the
other above commands just by sending single bytes.
Oddly, the OnStream drive did *not* accept an 01 command.
Thank you- -John
John, what's your working OS platform? For fooling with SCSI, the ASPI
interface of MS-DOS is pretty straightforward--and easy to use.
http://ftp.isu.edu.tw/pub/Hardware/ADAPTEC/adaptec/aspi_dos.txt
..and if you goof up, just hit the RESET button and you're back in
business in a few seconds.
A CDB's a CDB, so whatever you learn on DOS can easily be transfered to
other OS interfaces (SPTI, SG, CAM, etc.).
As far as tape-drive specific commands, there's always an ANSI T10
document, but that's like trying to learn about parking regulations from
a university law library--it's probably all there, but you'll have to
plow your way through a lot of stuff. FWIW, T10 doesn't refer to the
things as "tape drives", but "sequential access devices". Here's
a T10
draft:
http://hackipedia.org/Hardware/SCSI/Stream%20Commands/SCSI-3%20Stream%20Com…
By far and away, the best place to learn practical SCSI interfacing is
from vendor's manuals themselves. One I found
particularly useful was
the HP 35470 DDS drive OEM product manual. Very clear
writing style.
Bitsavers is full of product manuals detailing exactly what and how a
product supports.
--Chuck