From: Chr <chunkeey@web.de>
To: Sergey Spiridonov <sena@hurd.homeunix.org>
Subject: Re: GA-MA790FX-DS5 SATA ahci NCQ erros on Jmicron 20360/20363  (JMB363) kernel 2.6.25-2 Debian/Lenny
Date: Sun, 24 Aug 2008 01:27:51 +0200
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Cc: Jeff Garzik <jeff@garzik.org>, linux-kernel@vger.kernel.org,
       Linux IDE mailing list <linux-ide@vger.kernel.org>
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On Sunday 24 August 2008 00:38:36 Jeff Garzik wrote:
> See http://ata.wiki.kernel.org/index.php/Libata_error_messages for an
> introduction.
>
> In general, tons of ATA bus errors and SError register bits means that
> problems are coming from the ATA bus, a.k.a. the SATA cable and its
> related connections.
>
> So...  suspect bad cables, bad port connectors, cable interference,
> motherboard-caused interference or grounding problems, power supply
> problems.
>
hmm, or something totally odd...

what happens if you do: (after you made a backup!)
"dd if=/dev/sdX(where X is your affected hdd?) of=/dev/null bs=1"
Note:
The important bit is the small bs (blocksize) number.
You can throw in a O_DIRECT flag to disable the caches, or 
if you have some "empty" partition space, you can "dd" into
it with a small blocksize too)

my seagate & even a samsung hd103uj doesn't like that and will spew
out the same sort problems you have just posted... (but they work fine,
if I don't do nasty dd things!)

and unfortunatly my md(raid1) seems to do lots of "small" reads & writes
when it starts to check/resync the whole 1TB array :-/.

Regards,
	Chr
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