linux-kernel - Re: [PATCH] ata: Disable NCQ for Crucial M225 brand SSDs

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Message-ID: <aacba7e1001261714n42a68824k62c411cd1e5d7893@mail.gmail.com>
Date:	Wed, 27 Jan 2010 06:44:10 +0530
From:	Vishal Rao <vishalrao@...il.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	David Rees <drees76@...il.com>, jgarzik@...ox.com,
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
	trivial@...nel.org, stable@...nel.org
Subject: Re: [PATCH] ata: Disable NCQ for Crucial M225 brand SSDs

2010/1/27 Alan Cox <alan@...rguk.ukuu.org.uk>:
> It could even be a Linux side bug or some kind of complicated Linux
> timing thing. That *has* happened before with the older IDE stack, so we
> need to be cautious, collect reports and try to see patterns before
> jumping to conclusions - unless the vendor advises us otherwise.

Good, I'm hoping you folks have better clout in soliciting responses from
users and vendors. In the mean time that I'm going to take a couple of
days to find the time to test on a different machine, here is a month-old
output of "dmesg | grep ata1" if it helps any:

http://pastebin.ubuntu.com/347122/

I'm running Ubuntu Lucid 10.04 alphas at the moment and note that even
if I "successfully reproduce" the problem on my alternate hardware, its
still the same particular disk which can't disprove that it's simply a
single defective piece - the only thing stuck in my mind is Win7rc working
fine so far while various other Linux distros have exhibited the same problem.
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