Date: Sat, 8 Sep 2007 19:44:06 +0100
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Jeff Garzik <jeff@garzik.org>
Cc: David Chinner <dgc@sgi.com>, n <xellos@bluebottle.com>,
       linux-kernel@vger.kernel.org
Subject: Re: limiting to UDMA/33 instead of UDMA/100 - pata_pdc202xx_old
 (also XFS error)?
Message-ID: <20070908194406.68b10855@the-village.bc.nu>
In-Reply-To: <46E1E2F6.5060307@garzik.org>
References: <007d01c7eaf6$74b9b350$0100a8c0@hak>
	<20070907130212.GI995458@sgi.com>
	<46E1E2F6.5060307@garzik.org>
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On Fri, 07 Sep 2007 19:47:02 -0400
Jeff Garzik <jeff@garzik.org> wrote:

> >>         res 51/84:00:3f:00:00/00:00:00:00:00/e0 Emask 0x10 (ATA bus error)
> >>         res 51/84:00:3f:00:00/00:00:00:00:00/e0 Emask 0x10 (ATA bus error)
> >>         res 51/84:00:21:9d:fc/00:00:00:00:00/e6 Emask 0x10 (ATA bus error)
> 
> 
> ATA bus error == straight-from-hardware reported error
> 
> Cable or connector is dying maybe?  Bad power supplies also sometimes 
> manifest this way.

With PATA some kind of misclocking can occassionally produce similar
results so its worth a bit of driver debug as well - especially if
forcing the speed down a little helps.
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