Problem with kernel upgrade and dmraid (LSI megaraid)

Luca Berra bluca at
Tue Apr 7 11:11:07 UTC 2009

On Tue, Apr 07, 2009 at 09:22:30AM +0200, Andreas Oster wrote:
>Hello all,
>I recently have run into a problem with a server of ours (HP DL320)
>with a raid 1 setup. The system is Mandriva Cooker and currently runs
>kernel kernel.h-2.6.27-desktop-0.rc5.2.1mnb. Now I would like to
>update the kernel to a newer 2.6.28 version, but if I do so the
>system does not boot because the root partition can not be found anymore.
>I read somewhere that sometimes the IDs (lsi_xxxxxxxxx) change, when
>changing the kernel.

this sounds very weird to me, i'd almost bet it is not the real reason.

mandriva uses redhat's initrd, which i personally despise.

but let's not be conecerned with my feelings, it suffices saying that it
will store the output of 'dmsetup table' for your running system, and
feed it to 'dmsetup create'

the table will contain the major/minor number of the components of the
array, if those change you are hosed.

do you have any other devices connected to your box that could alter the
order of "scsi" devices seen by the system?

can you please boot without the splash screen and copy every line
between the 'Red-Hat nash version xxx starting' and the panic message?
A serial console would be great, but a digital camera or a sheet of
paper and a pencil would do.


Luca Berra -- bluca at
         Communication Media & Services S.r.l.
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