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From: Terry Lambert <terry@lambert.org>
Message-Id: <199509141832.LAA10037@phaeton.artisoft.com>
Subject: Re: Does FreeBSD suffer from the Intel RZ1000 IDE bug?
To: R.L.Hesketh@ukc.ac.uk (Richard Hesketh)
Date: Thu, 14 Sep 1995 11:32:10 -0700 (MST)
Cc: hackers@freebsd.org, questions@freebsd.org
In-Reply-To: <21264.811096337@crane> from "Richard Hesketh" at Sep 14, 95 05:32:17 pm
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> I've read that Intel have a bug in their RZ1000 controller chip
> found on some of their PCI motherboards (and guess what motherboard
> I have 8-)
> 
> The full details are given under:
> 
> http://www.intel.com/procs/support/rz1000/index.html
> 
> Linux is listed as being affected and I was wondering if FreeBSD
> was as well or if a fixed driver is available and from what version
> of FreeBSD is it in?
> 
> As a workaround I am turning off use of IDE Pre-fetch buffers
> in my BIOS setup (as recommended by Intel).

Windows95 is also affected.  You can fix it by turning off 32 bit disk I/O.

The problem occurs when you take an interrupt during DMA transfer.

The FreeBSD IDE drivers don't use DMA.


					Terry Lambert
					terry@lambert.org
---
Any opinions in this posting are my own and not those of my present
or previous employers.