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From: "Barry K. Nathan" <barryn@cx518206-b.irvn1.occa.home.com>
Message-Id: <200102142137.NAA01678@cx518206-b.irvn1.occa.home.com>
Subject: Re: IDE DMA Problems...system hangs
To: alan@lxorguk.ukuu.org.uk (Alan Cox)
Date: Wed, 14 Feb 2001 13:37:26 -0800 (PST)
Cc: jsidhu@arraycomm.com (Jasmeet Sidhu), linux-kernel@vger.kernel.org
Reply-To: barryn@pobox.com
In-Reply-To: <E14T8XO-0005wN-00@the-village.bc.nu> from "Alan Cox" at Feb 14, 2001 08:28:27 PM
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Alan Cox wrote: 
>> Feb 13 05:23:27 bertha kernel: hdo: dma_intr: status=0x51 { DriveReady 
>> SeekComplete Error }
>> Feb 13 05:23:27 bertha kernel: hdo: dma_intr: error=0x84 { DriveStatusError 
>> BadCRC }
> 
>You have inadequate cabling. CRC errors are indications of that. Make sure you
>are using sufficiently short cables for ATA33 and proper 80pin ATA66 cables.

I've had cases (on VIA chipsets) where, even or ATA33, a 40-pin cable
caused CRC errors for ATA33 and an 80-pin cable fixed things. (The same
40-pin cable does ATA33 without problems on an AMD 750 or an Intel BX,
though.)

IIRC, Andre Hedrick has said in the past that a marginal PSU or
motherboard can also cause CRC errors.

-Barry K. Nathan <barryn@pobox.com>
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