[Centos] 2.4.21-27.0.1.ELsmp & megaraid2 problem

Johnny Hughes mailing-lists at hughesjr.com
Fri Dec 31 10:46:41 UTC 2004

On Fri, 2004-12-31 at 11:30 +0200, Toni wrote:
> I've found a problem with CentOS 3 latest kernel (2.4.21-27.0.1.ELsmp)
> and megaraid2 driver.
> Hardware: Dell PE1600SC with CERC ATA100 RAID controller
> The problem is somewhat similar, but not identical as:
> https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=123289
> After updating new glibc and kernel packages the new kernel don't boot.
> Boot fails to mount root fs with "Cannot open root device" message.
> I doublechecked that /etc/modules.conf is refering to megaraid2 as it
> should and then recreated initrd manually, no help. Older kernel version
> (2.4.21-20.0.1.ELsmp) boots just fine.
> As RHEL3 U4 release notes states:
> http://www.redhat.com/docs/manuals/enterprise/RHEL-3-Manual/release-notes/as-x86/RELEASE-NOTES-U4-x86-en.html
> The megaraid2 driver has been updated from v2.10.6 to
> The new driver is scsi/megaraid2.o
> The older driver has been preserved as addon/megaraid_2106/megaraid_2106.o
> So I decided to try megaraid_2106, changed modules.conf, recreated
> initrd and... server booted with the new kernel!
> Could there be a problem with the latest megaraid2 driver
> ( Since I'm using CentOS and not RHEL, how/where I could
> report this problem?

I would report this at bugzilla.redhat.com for RHEL 3.  I report bugs
with the RedHat SRPMS there all the time. (It's down for maintenance
right now).  In your verbose description, you can include that this is
on CentOS-3 but seems to be an upstream driver problem on
the 2.4.21-27.0.1.ELsmp kernel.

You might also want to post it to the taroon-list (RHEL 3) mailing list:

RedHat is happy for legitimate problems to be posted so they can take
corrective action.  That is one of the benefits to the rest of the Linux
community that CentOS provides.

Johnny Hughes

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