linux-kernel - Re: Slow disks.

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Message-ID: <AANLkTikC0gDixPMaj3zZJ9ew7wYx81Ern60omnig-S7c@mail.gmail.com>
Date:	Wed, 22 Dec 2010 12:52:08 -0800
From:	David Rees <drees76@...il.com>
To:	Rogier Wolff <R.E.Wolff@...wizard.nl>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Slow disks.

On Mon, Dec 20, 2010 at 6:15 AM, Rogier Wolff <R.E.Wolff@...wizard.nl> wrote:
> A friend of mine has a server in a datacenter somewhere. His machine
> is not working properly: most of his disks take 10-100 times longer
> to process each IO request than normal.

I've seen noticeable slowdowns before when the disks were running long
SMART tests.  It doesn't seem to affect all drives the same.  The
smartctl data you posted didn't say whether or not the disks were
currently running a SMART test, but it's worth double checking.

-Dave
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