From: Neil Conway <nconway.list@ukaea.org.uk>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: linux-kernel@vger.kernel.org
Subject: Re: IDE corruption, 2.2, VIA chipset in PIO mode
Date: Mon, 04 Jun 2001 18:29:22 +0100 [thread overview]
Message-ID: <3B1BC572.A0591812@ukaea.org.uk> (raw)
In-Reply-To: <E156xkJ-0005d3-00@the-village.bc.nu>
Alan Cox wrote:
>
> > Used for a while, copied about 7gigs onto it. Then got lots of BadCRC
> > errors when reading from disk (from dma_intr). Decided to disable DMA
> > as a result of this...
>
> Cable errors. Disabling DMA also disabled error checking and correction
Jeez. Crappity, crappity, crap. Embarrassing mistake of the year.
I managed to convince myself that the cable couldn't possibly be
responsible, because we got corruption even when using UDMA-33 (which
protects from cable faults). Somewhere in my logic I obviously lost the
plot, and forgot that I switched DMA off *before* seeing corruption.
Sigh. Ah, I think I see a nice brown bag, in a nice deep hole.
Thank you for gently pointing out the error of my ways ;-)
Neil
next prev parent reply other threads:[~2001-06-04 18:07 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-06-04 14:43 IDE corruption, 2.2, VIA chipset in PIO mode Neil Conway
2001-06-04 17:02 ` Alan Cox
2001-06-04 17:29 ` Neil Conway [this message]
[not found] <E156y8B-0005eg-00@the-village.bc.nu>
2001-06-05 8:29 ` Neil Conway
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