linux-kernel - Re: MD/RAID time out writing superblock

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Date:	Mon, 7 Sep 2009 12:55:04 -0400
From:	Allan Wind <allan_wind@...eintegrity.com>
To:	Chris Webb <chris@...chsys.com>
Cc:	linux-scsi@...r.kernel.org, Tejun Heo <tj@...nel.org>,
	Ric Wheeler <rwheeler@...hat.com>,
	Andrei Tanas <andrei@...as.ca>, NeilBrown <neilb@...e.de>,
	linux-kernel@...r.kernel.org,
	IDE/ATA development list <linux-ide@...r.kernel.org>,
	Jeff Garzik <jgarzik@...hat.com>, Mark Lord <mlord@...ox.com>
Subject: Re: MD/RAID time out writing superblock

On 2009-09-07T12:44:42, Chris Webb wrote:
> Sorry for the late follow up to this thread, but I'm also seeing symptoms that
> look identical to these and would be grateful for any advice. I think I can
> reasonably rule out a single faulty drive, controller or cabling set as I'm
> seeing it across a cluster of Supermicro machines with six Seagate ST3750523AS
> SATA drives in each and the drive that times out is apparently randomly
> distributed across the cluster. (Of course, since the hardware is identical, it
> could still be a hardware design or firmware problem.)

Seeing the same thing with a Supermicro motherboard and a pair WDC 2 TB 
drives.  Disabling NCQ does not resolve the issue, nor increasing 
the safe_mode_delay.  This is with 2.6.30.4.  This machine is 
sitting on its hand (i.e. no significant load).


/Allan
-- 
Allan Wind
Life Integrity, LLC
<http://lifeintegrity.com>

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