*BSD News Article 21258


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From: fmayhar@acsc.com (Frank Mayhar)
Newsgroups: comp.os.386bsd.bugs
Subject: Re: Problems with installation of NetBSD 0.9...
Date: 21 Sep 1993 16:39:19 GMT
Organization: Advanced Computing Systems Company
Lines: 29
Distribution: world
Message-ID: <27nann$9kd@acsc.com>
References: <27ldlm$j27@acsc.com> <AARON.93Sep21184413@downstage.comp.vuw.ac.nz> <27mve3$plb@hrd769.brooks.af.mil>
Reply-To: fmayhar@acsc.com
NNTP-Posting-Host: cpuserver.acsc.com

I read my first try at this article, and realized it could be misinterpreted
as a slam against Dave.  It wasn't intended as such, and I've cancelled it
and am trying again.

In article <27mve3$plb@hrd769.brooks.af.mil>, burgess@hrd769.brooks.af.mil (Dave Burgess) writes:
|> I think that we have a considerable quantity of anecdotal evidence that
|> there is at least one timing problem in the wd.c code.  Heavy disk usage
|> causing a hard drive hang (versus a coplete system hang) is a known bug,
|> and there is even some mention of it in the FAQ (which is available by
|> anonymous FTP in pub/FAQ:hrd769.brooks.af.mil).  I had a similar problem
|> while using an Ultrastore 24F in IDE emulation mode.  It is reasonable
|> to assume then that it is not a hardware problem, but a software
|> problem.  The description in the FAQ gives a pretty good explanation of
|> a cause and solution.  The solution is kind of 'brute force' but fixes
|> most of these hangs after the fact (except for mine, where the reset
|> semantics are just 'a little bit' different).

I read the FAQ; this problem isn't quite the same as mine; sometimes I see
the behavior described, but most of the time it just shoots the SCSI, and
I can still use the IDE.  I'll try the recommended fix anyway, and see if
it helps.  Doubt it will, though.  The problem described in the FAQ makes
no mention of a "ISA strayintr 7" message, for one thing.

The thing that is really confusing is that it _is_ shooting the SCSI, and
not wd0.
-- 
Frank Mayhar  fmayhar@acsc.com
	      Advanced Computing Systems Company
	      3000 S. Robertson Blvd. Suite 400, LA, CA 90034   (310) 815-4858