CentOS - Jun 2014 - Odd kernel panic, repeatable

I had an old server die; we had another, same model, sitting around lightly 
used, so I did what I've done before: swap the RAID card into that, swap the
drives, even putting them in the same bays as the dead one, and boot.

Nope. 100% of the time, when it hits switching roots, it kernel panics.

Adding rdshell to the kernel line does nothing, I get no grub rdshell. Booting 
from a flash drive into rescue, it finds everything, *perfectly*, and mounts 
it all, including the RAID data drives.

I've rebuilt the initrd, and no joy.

Anyone have an idea?

	mark

On Tue, Jun 3, 2014 at 7:09 AM, mark <m.roth at 5-cent.us>
wrote:
> I had an old server die; we had another, same model, sitting around lightly
> used, so I did what I've done before: swap the RAID card into that,
swap the
> drives, even putting them in the same bays as the dead one, and boot.
>
> Nope. 100% of the time, when it hits switching roots, it kernel panics.
>
> Adding rdshell to the kernel line does nothing, I get no grub rdshell.
Booting
> from a flash drive into rescue, it finds everything, *perfectly*, and
mounts
> it all, including the RAID data drives.
>
> I've rebuilt the initrd, and no joy.
>
> Anyone have an idea?
Did you try running "grub-install" after your rescue-mode boot and
chroot into /mnt/sysimage?  If that doesn't fix it there is probably
something different about the device/naming of the root partition.

-- 
   Les Mikesell
     lesmikesell at gmail.com