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

[Lars TÃuber]

Hi Valdis,

Am Tue, 05 Jul 2011 18:34:47 -0400
Valdis.Kletnieks@xxxxxx 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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