linux-kernel - Re: Lots of con-current I/O = resets SATA link? (2.6.25.10)

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Message-ID: <alpine.DEB.1.10.0807051923380.23222@p34.internal.lan>
Date:	Sat, 5 Jul 2008 19:24:52 -0400 (EDT)
From:	Justin Piszcz <jpiszcz@...idpixels.com>
To:	Robert Hancock <hancockr@...w.ca>
cc:	linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org,
	linux-ide@...r.kernel.org, xfs@....sgi.com,
	Alan Piszcz <ap@...arrain.com>
Subject: Re: Lots of con-current I/O = resets SATA link? (2.6.25.10)



On Sat, 5 Jul 2008, Robert Hancock wrote:

> Justin Piszcz wrote:
>>> Can you post your dmesg from bootup with the controller/drive detection?
>
> So you've got 6 drives in the machine. Intel chipsets normally seem pretty 
> robust with AHCI.
>
> Are you certain that your machine has enough power to run all those drives 
> properly? We've seen in a number of cases that power fluctuations or noise 
> can cause these kinds of errors.

I have a 650watt PSU (nice antec one) and the power draw of the box is 
~148watts w/ veliciraptors, ~250 when fully load all 4 cores + all 12 
disks writing.  I have turned off the irqbalance daemon and I am going to 
see if the problem re-occurs.

Justin.
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