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Date: Mon, 30 Dec 1996 08:12:05 +0200 (IST)
From: Nadav Eiron <nadav@cs.technion.ac.il>
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To: Wolfgang Helbig <wh@helbig.informatik.ba-stuttgart.de>
cc: freebsd-questions@freebsd.org
Subject: Re: Re : FreeBSD gets stuck while copying installation files
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On Sun, 29 Dec 1996, Wolfgang Helbig wrote:

> Hi,
> 
> 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).
> And it happens with two disks or with disk and CDROM. All configurations
> work just fine, (booting and probing the hardware gets to the expected
> results), the problem starts when you start copying from CDROM on one
> ide channel to the disk on the other channel during installation, or
> when you copy from a disk on one channel to a disk on the other channel.
> 
> Maybe the cause is the PCI-Dual-Ide-controller chip?
> On my motherboard the CMD PCI0640B chip is working. 
> 
> If anyone has similar experiences I would like to get a note on the
> mailing list.

This is a well known bug (feature?) of the CMD640 chip. FreeBSD cannot 
(at least AFAIK) use both its channels. However, my previous posting you 
referred to was about a disk and a CD which are *both* on the primary 
channel causing the machine to lock up. 

> 
> Thank You
> Wolfgang Helbig
> 
Nadav