linux-kernel - Re: [PROBLEM] reproduceable storage errors on high IO load

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Message-Id: <20110714111642.83335f2a.taeuber@bbaw.de>
Date:	Thu, 14 Jul 2011 11:16:42 +0200
From:	Lars Täuber <taeuber@...w.de>
To:	linux-kernel@...r.kernel.org
Subject: Re: [PROBLEM] reproduceable storage errors on high IO load

Hello everybody.

In the meantime I received a driver from areca. It's split into GPLed source
and precompiled object files.

I still get the same problems (and additional ones) with this driver as with
the mvsas driver. The log output differs but in the end it stalls the disks.

I fear that exchanging the hba with another one from LSI or the like I will
get the same problem. But I can't effort such a card just for testing.

I have a complete dmesg output if someone is interested.

What can I do?????

Thanks
Lars

Am Wed, 6 Jul 2011 09:11:17 +0200
Lars Täuber <taeuber@...w.de> schrieb:
> Hi Valdis,
> 
> Am Tue, 05 Jul 2011 18:34:47 -0400
> Valdis.Kletnieks@...edu schrieb:
> > 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)
> 
> No it wasn't the same disk but drives of identical type and version and with
> same firmware.
> All the problems I came across during my odyssey could be different ones.
> The most recent could be related to the mvsas driver.
> 
> See https://bugzilla.kernel.org/show_bug.cgi?id=14534#c11 and following.
> 
> Thanks
> Lars
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