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Message-ID: <62378.1309905287@turing-police.cc.vt.edu>
Date:	Tue, 05 Jul 2011 18:34:47 -0400
From:	Valdis.Kletnieks@...edu
To:	Lars Täuber <taeuber@...w.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PROBLEM] reproduceable storage errors on high IO load

On Mon, 04 Jul 2011 15:39:23 +0200, Lars =?UTF-8?B?VMOkdWJlcg==?= said:

> 1.
> * Ultrastar 7K3000 attached to onboard AMD_AHCI
> * dd if=/dev/zero of=/dev/sde
> * dd told write speed of: 15.7MB/s
> * no error after half an hour
> 
> 2.
> * Ultrastar 7K3000 attached to PCIe to sata_mv controller
> * dd if=/dev/zero of=/dev/sda
> * dd told write speed of: 6.5MB/s
> * no error but strange log: dmesg-PCIe-sata_mv.log.gz
> 
> 3.
> * Ultrastar 7K3000 attached to PCIe areca SAS HBA (mvsas)
> * dd if=/dev/zero of=/dev/sdg
> * dd told write speed of: 1.3MB/s
> * errors: dmesg-PCIe-mvsas.log.gz

Umm.. was this the *same* Ulstrastar disk connected 3 different ways?  And how
exactly was it connected in each case? (Trying to rule out flaky disks if it
was 3 different disks, or a hardware/cabling issue specific to the areca
controller)


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