DMRAID+Intel P35 (ICH9R)
Heinz Mauelshagen
mauelshagen at redhat.com
Sat Jul 14 09:12:39 UTC 2007
On Fri, Jul 13, 2007 at 03:11:09PM +0200, Piotr Brostovski, Levigo Systems wrote:
> Hello,
>
> I'm stuck with a problem which is related to the combination of the new
> Intel ChipSet P35 on the Gigabyte P35C-DS3R and Linux (Ubuntu 7.04
> Feisty Fawn).
> I try to find the information how DMRAID stores its Raidinformation -
> and where.
See description of dmraid(8).
Various metadata formats are supported (dmraid -l).
Such vendord specific metadata typically sits at the end of each componet
device in a RAID set and is vendor specific.
If you are interested in details, look at the .h files below lib/format/
in the dmraid source tree.
> The DMRAID man page sadly don't say anything about it how DMRAID works
> and google finds a lot - but not what I'm exactly looking for ....
> So i try it with this E-Mail ;)
>
> The Problem is, with the Intel P35 system and Linux my raidarray get
> broken. And i don't know if DMRAID writes anything on the disks?
Not yet.
Enhancements to so in order to eg. replace a broken mirror member,
are in the works.
> All partitions are read-only mounted - or even not mounted at all -
> still the raid get corrupted.
>
> With the nForce Chipsets for AMD CPUs dmraid always worked perfectly
> (except the bug with an old DMRaid Version, but after compiling DMRaid
> 1.0-RC13 everything just run fine) but with the Intel Chipset i even
> can't say what exactly is the problem ...
Might be a flaw in the isw metadata format handler.
Send your metadata to me for investigation please.
>
> It could be possible that it is a hardware fault, but I'm not sure about
> it because with Windows everything seems to work fine.
Well, sounds like a bug in the isw code...
> Discussions in the Gigabyte support forum doesn't step ahead, in the
> Ubuntu support forum i haven't even an answer to this problem :(
>
> http://62.109.81.232/cgi-bin/sbb/sbb.cgi?&a=show&forum=1&show=3352&start=
> http://forum.ubuntuusers.de/viewtopic.php?p=814604#814604
>
>
> Maybe you heard about problems with DMRAID and Intel P35, possible in
> particular on the Gigabyte P35 Mainboards?
>
>
> Yours faithfully,
> Piotr Brostovski
--
Regards,
Heinz -- The LVM Guy --
*** Software bugs are stupid.
Nevertheless it needs not so stupid people to solve them ***
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Heinz Mauelshagen Red Hat GmbH
Consulting Development Engineer Am Sonnenhang 11
Storage Development 56242 Marienrachdorf
Germany
Mauelshagen at RedHat.com PHONE +49 171 7803392
FAX +49 2626 924446
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