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To: Andreas Klemm <andreas@knobel.gun.de>
cc: moto@CS.cmu.edu, freebsd-hackers@FreeBSD.org
Subject: Re: AHC2940 + Micropolis/Seagate w/wo tagged queueing 
In-reply-to: Your message of Sat, 29 Apr 1995 16:06:46 +0200.
             <199504291406.QAA02352@knobel.GUN.de> 
Reply-To: moto@CS.cmu.edu
From: moto@CS.cmu.edu
Date: Sat, 29 Apr 1995 13:45:40 -0400
Message-ID: <17825.799177540@GS81.SP.CS.CMU.EDU>
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Hi, all

>>>>> "Andreas" == Andreas Klemm <andreas@knobel.GUN.de> writes:

>> I have two types of drive (Micropolis 4221 and Seagate Barracuda I
>> (ST11950N)) and an AHA-2490. I did some experiments with these
>> drives enabling/disabling the tagged queueing option on
>> 940412-SNAP. Here is the result:
>> 
>> Machine: GATEWAY2000 P5-100 Controller: AHA-2940
>> 
>> Case 1) Kernel: 950412-SNAP stock Drive: Seagate Barracuda I
>> Result: perfectly working (even with 10MB/s xfer rate).
...

(stuff deleted)

Andreas> Whats the status of this ? We use AHA 2940 in our
Andreas> departement. I'd love to see this fixed. I wanna persuade our
Andreas> developers to go with FreeBSD when 2.1 is out. So this is
Andreas> important for me.

Not much progress :-) I'm currently using Micropolis 4221 without
tagged queueing under 8Mb/s xfer rate. This is stable at lease for me.

As Jordan made an announcement yesterday, ftp.freebsd.org, which is
the flagship machine of FreeBSD project, is now using AHA2940 (I don't
know whether they're enabling the tagged queueing or not,
though). This makes me believe that AHA2940 driver in
soon-to-be-comming 2.0.5. would be so solid.


==============================================================================
Motonori Shindou       Carnegie Mellon University       SCS Graduate Student
              e-mail: moto@cs.cmu.edu,  NiftyServe: GEG04056
WWW: http://www.cs.cmu.edu:8001:/afs/cs.cmu.edu/user/moto/WWW/moto-home.html
                   TEL: 412-362-9636   FAX: 412-362-9634
==============================================================================