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From: Brian <hiryuu@envisiongames.net>
To: "Paul G. Allen" <pgallen@randomlogic.com>,
        "Linux kernel developer's mailing list" 
	<linux-kernel@vger.kernel.org>
Subject: Re: Dual Athlon: Kernel 2.4.14 IDE problems
Date: Tue, 20 Nov 2001 11:23:55 -0500
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We use 20 GB Western Digitals on our dual Athlons.  The chipset does 
support DMA and it has been quite stable.  Therefore, I would direct blame 
toward the drive.

	-- Brian

On Tuesday 20 November 2001 07:41 am, Paul G. Allen wrote:
> I just compiled and installed a vanilla 2.4.14 kernel (nope, I haven't
> tweaked this one yet :). Just as a reminder, I have a Tyan Thunder K7
> with 2 1.4GHz Athlons (_NOT_ MP or XP). It has an IBM DTLA-307030
> Ultra100 IDE drive on the Ultra100 IDE interface.
>
> The kernel seems to boot with DMA enabled for this drive which causes
> frequent system lockups. This is the same problem I had with kernels
> through 2.4.9 (including the ac series). Disabling DMA (hdparm -d0
> /dev/hda) solves the problem.
>
> Is this a hardware issue with the MP chipset (I have not kept up to date
> on AMD errata due to other projects), or is this drive one of the known
> IDE drives that do not properly support DMA? If a chipset issue, should
> the kernel not detect the problem and disable DMA?
>
> PGA
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