[CentOS] CentOS 6.2 on partitionable mdadm RAID1 (md_d0) - kernel panic with either disk not present
Arun Khan
knura9 at gmail.com
Tue Jun 19 19:23:32 UTC 2012
On Wed, Jun 20, 2012 at 12:11 AM, <m.roth at 5-cent.us> wrote:
> Arun Khan wrote:
>> Device Boot Start End Blocks Id System
>> /dev/sda1 * 1 523 4194304 83 Linux
>> Partition 1 does not end on cylinder boundary.
>> /dev/sda2 523 1045 4194304 83 Linux
>> /dev/sda3 1045 1176 1048576 82 Linux swap /
>> Solaris
> <snip>
> Ok, I see that it's hardware 512b blocks, so you're not running into
> issues with 4k hardware blocks. I trust you installed grub on /dev/md0,
> which I assume is /dev/sda1 and /dev/sdb1?
>
>From the wiki instructions, there is no re-installation of GRUB, only
a couple of changes in /boot/grub/grub.conf file installed by the
regular installation on /dev/sda. During the RAID1 creation process
the grub from /dev/sda would mirrored into the RAID1 device and
appear on the MBR of both the disks.
As I said in the OP, I do see the grub menu with either of the disks
"unplugged" i.e. missing. The kernel does boot and the white
progress bar goes upto about 50% when the kernel panic occurs. I will
turn off the splash and see what comes up on the console. Gut
feeling -- I suspect the problem is with the initrd image created
with the "dracut"
-- Arun Khan
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