[8399] in linux-scsi channel archive
Adaptec 7xxx info?
daemon@ATHENA.MIT.EDU (Linda Walsh)
Sat Mar 18 10:47:29 2000
Message-ID: <38D2BCA7.9738B4B7@sgi.com>
Date: Fri, 17 Mar 2000 15:15:51 -0800
From: Linda Walsh <law@sgi.com>
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To: linux-scsi@vger.rutgers.edu
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Hi...
Got two questions, really, first is more general:
I have a semi-newbie question. What exactly is tagged command queueing?
Does it mean I can send commands for different drives to the controller and
it will queue them or does that mean the device itself handles the requests?
Lets suppose I have 1 drive that allows queuing and another that doesn't.
Does that mean anytime I send something to the non-queueing drive I have
to wait on that drive before sending any other commands over the bus? Or
is the driver re-entrant such that one thread could be servicing the NQ
device while other threads would be putting queued commands on the bus
for other queueing devices?
2nd -- where do I find the Hardware Programmers Guide for the adaptec
series -- specifically the 7890 -- like what language is downloaded into the
drive, hardware states, etc? I can't seem to find the right location on
the adaptec website.
Thanks!
-linda
--
Linda Walsh @ SGI | Core Linux - Trust Technology
1200 Crittenden Lane MS:30-3-802 | Voice: (650) 933-5338
Mountain View, CA 94043 | Email: law@sgi.com
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