[SATLUG] GRUB @ RAID

Daniel Wallace danielwallace at gtmanfred.com
Sun Oct 13 11:00:25 CDT 2013


The problem isn't with initrd, he isn't even getting to initrd.

It was a grub error 13, meaning it can't find the grub installation, so it has moved from where it was when grub was originally installed to mbr.

Daniel

> Date: Sun, 13 Oct 2013 02:55:43 -0500
> From: demeler at biochem.uthscsa.edu
> To: satlug at satlug.org
> Subject: Re: [SATLUG] GRUB @ RAID
> 
> 
> Your initrd probably lacks RAID 1 support. You will need to rebuild
> your initrd with RAID1 support. That should fix the problem.
> 
> -borries
> 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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