linux-ext4 - Re: ext4: (2.6.34-rc4): This should not happen!! Data will be lost

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Date:	Fri, 16 Apr 2010 09:36:54 -0700
From:	Andrew Vasquez <andrew.vasquez@...gic.com>
To:	Andre Noll <maan@...temlinux.org>
CC:	Eric Sandeen <sandeen@...hat.com>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
	Linux Driver <Linux-Driver@...gic.com>,
	Thomas Helle <Helle@...bingen.mpg.de>
Subject: Re: ext4: (2.6.34-rc4): This should not happen!!  Data will be lost

On Fri, 16 Apr 2010, Andre Noll wrote:

> On 08:52, Andrew Vasquez wrote:
> > The driver here is simply reporting that the a command's timeout value
> > had been exceeded and the mid-layer began error-recovery with a request
> > to 'abort' the command.  The abort-request completed successfully:
> > 
> > 	qla2xxx 0000:06:09.0: scsi(0:0:0): Abort command issued -- 1 fa6a73 2002.
> > 
> > I can't explain why the storage did not complete the request in the
> > allotted time.
> 
> Ah, that's valuable information, thanks. The underlying Infortrend
> Raid System is rather old but worked without any problems for several
> years. We recently replaced its 400G disks by new 2T WD disks. Maybe
> the new disks have longer response times, could that be the reason? And
> is there a way to increase the timeout value?

To update the default timeout value (30 seconds) for commands
submitted to /dev/sdn to 60 seconds:

        $ echo 60 > /sys/block/sdn/device/timeout

-- av
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