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Subject: Re: dma problems with Serverworks CSB5 chipset
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
Cc: Richard Wohlstadter <rwohlsta@watson.wustl.edu>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
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Date: Tue, 03 Aug 2004 18:31:33 +0100
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On Maw, 2004-08-03 at 19:08, Marcelo Tosatti wrote:
> ServerWorks OSB4/5 chipsets are known to not work reliably with the Linux
> IDE code. AFAIK its a hardware problem which we dont correctly work around.
> 
> Have you tried disabling DMA?
> 
> Bart and Alan are IDE experts, they can probably give you more useful
> information.

CSB5 is reliable, rock solidly so in my experience. OSB4 was the older
interface with problems. Are these systems SMP, what disks are you using
and in what IDE mode ?