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Date:	Sun, 30 May 2010 13:33:50 -0600
From:	Thomas Fjellstrom <tfjellstrom@...angesoft.net>
To:	linux-kernel@...r.kernel.org
Cc:	Robert Hancock <hancockrwd@...il.com>, linux-ide@...r.kernel.org
Subject: Re: via 8237 sata errors

On May 30, 2010, Thomas Fjellstrom wrote:
> On May 30, 2010, Robert Hancock wrote:
> > On 05/29/2010 08:46 PM, Thomas Fjellstrom wrote:
> > > I'm getting a rather nasty set of messages from dmesg when trying to
> > > use a couple SATA II WD 2TB Green drives with an older system (via
> > > 8237 based). They seem to work fine on a newer p35 based system.
> > 
> > ..
> > 
> > > [  283.308963] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action
> > > 0x0 [  283.309007] ata2.00: BMDMA stat 0x4
> > > [  283.309045] ata2.00: failed command: READ DMA
> > > [  283.309089] ata2.00: cmd c8/00:08:08:08:30/00:00:00:00:00/e0 tag 0
> > > dma 4096 in [  283.309091]          res
> > > 41/04:00:08:08:30/00:00:00:00:00/e0 Emask 0x1 (device error) [
> > > 283.309171] ata2.00: status: { DRDY ERR }
> > > [  283.309207] ata2.00: error: { ABRT }
> > > [  283.324886] ata2.00: configured for UDMA/133
> > > [  283.324904] ata2: EH complete
> > 
> > It's not really clear why the drive is returning command aborted on a
> > read, there's no other error bits to indicate an uncorrectable error or
> > a CRC error. Is it only the one drive that's giving the errors?
> 
> I'm not entirely sure if its the same drive each time. I can make sure
> today. The fun part is it works fine in a different machine. Where as it
> will start erroring out like that almost right away in the via based
> machine. When its doing that, its also making some fairly scary (for a
> hard drive) noises, but since it doesn't do that in the p35 machine I'm
> really hoping it isn't the drive.

I've started up a dd on each drive, just for kicks, and reading from both of 
them at the same time seems to work fine on the via chipset. Given this 
little tid-bit, it seems its only once md-raid is setup on the drives does 
one of them freak out.

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-- 
Thomas Fjellstrom
tfjellstrom@...angesoft.net
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