Borries Demeler demeler at biochem.uthscsa.edu
Sun Oct 13 02:55:43 CDT 2013

Your initrd probably lacks RAID 1 support. You will need to rebuild
your initrd with RAID1 support. That should fix the problem.

On Sat, Oct 12, 2013 at 06:36:30PM -0700, dikov dikov wrote:
> Hi
> There is an Centos 6 installation with two HDDs in LSI RAID1 array. /boot is on separate partition 1 and rest (/) on LVM. After yum update with new kernel the boot process stopped at grub with error 13. Here I was asked to help. I tried to install grub into MBR of the RAID1 disk manually. I booted from rescue live CD and from chroot tried to 
> #grub-install   /dev/mapper/ddf1_XXXXXX (i.. to MBR of RAID)
> but got error that there is corresponding BIOS drive. I spent a lot of time in grub  console no luck. With soft RAID I should install into MBR of every disk like 
> grub> setup (hd0)
> but this did not work here.
> Finally, I followed "install or upgrade" in live CD menu and was able to restore grub without reinstalling OS. In that wizard I selected to install GRUB in MBR of the RAID drive i.e. ddf1_XXXX and it worked.
> So my question is what the magic going on with grub and hard RAID? 
> best,
> Dmytro
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