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Date: Mon, 30 Dec 1996 07:43:06 +1100 (EST)
From: Andrew MacIntyre <andymac@bullseye.apana.org.au>
To: Wolfgang Helbig <wh@helbig.informatik.ba-stuttgart.de>
cc: nadav@cs.technion.ac.il, freebsd-questions@freebsd.org
Subject: Re: Re : FreeBSD gets stuck while copying installation files
In-Reply-To: <199612291647.RAA00181@helbig.informatik.ba-stuttgart.de>
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On Sun, 29 Dec 1996, Wolfgang Helbig wrote:

> On Friday, 14 Jun 1996, Nadav Eiron wrote about a FreeBSD box
> getting stuck while copying between two IDE-Channels. (i. e. CDROM
> on wdc0 and /usr mounted on wdc1). I experienced the same difficulties.
> It seems that any concurrent uses of both ide controllers leads to
> a stopp of the system. This happens with GENERIC kernel 2.1.5, 2.2-Alpha
> and -current (of yesterday).

{...}

> Maybe the cause is the PCI-Dual-Ide-controller chip?
> On my motherboard the CMD PCI0640B chip is working. 
                        ^^^^^^^^^^^^
This chip and the RZ1000 are now widely known for this problem, and its 
not FreeBSD specific.

There is a web page around that provides info on confirming its existance 
(sorry I don't recall the URL, but try searching on RZ1000 or CMD640).

I have this vague recollection that the problem has something to do with 
a "prefetch buffer" - if your BIOS has a reference to this in its IDE 
settings, you might try disabling it....

Andrew I MacIntyre                     "These thoughts are mine alone..."
E-mail: andrew.macintyre@aba.gov.au    (work) | Snail: PO Box 370
        andymac@bullseye.apana.org.au  (play) |        Belconnen  ACT  2616
Fido:   Andrew MacIntyre, 3:620/243.18        |        Australia