Date: Sat, 17 Oct 1998 22:23:33 +0200 (CEST) From: Søren Schmidt <sos@FreeBSD.ORG> To: brett@lariat.org (Brett Glass) Cc: sos@FreeBSD.ORG, bugs@FreeBSD.ORG Subject: Re: Crash workaround: ATAPI and ATAPI_STATIC required in 2.2.7 wd driver Message-ID: <199810172023.WAA11624@sos.freebsd.dk> In-Reply-To: <4.1.19981017135219.06f00520@mail.lariat.org> from Brett Glass at "Oct 17, 98 01:55:29 pm"
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In reply to Brett Glass who wrote:
>
> >> There's got to be some reason why the code is trying to access
> >> invalid addresses in one case but not the other....
> >
> >Well, yes :)
>
> Well, I do see some code inside #ifdef ATAPI conditionals that
> seems to deal with buffers and/or IRQs. Could it be that this is the
> difference? (I'll send you the 2.2.7 wd.c if it's convenient.)
Hmm, not really I just took a look at the 2.2.7 wd.c...
Does your BIOS allow you to set the parameters used for the disk,
ie can you hardwire it to a specific PIO mode ?? if so I'd check
what the BIOS sets it to as default, and step that back one notch,
then see if the problem persists.
Maybe you already stated that, but what chipset does your machine(s)
have ?? Some chipsets does push the timing quite a bit which in
some cases causes problems.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Søren Schmidt (sos@FreeBSD.org) FreeBSD Core Team
Even more code to hack -- will it ever end?
..
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