Convert LVM root to RAID1 - stop booting

English Install/Boot/Login
1

Hi,

OpenSuse 12.3

I’ve read somewhere there’s no problem in use LVM RAID at system/root LVM , since the /boot keeps out of this LVM .
So , I added new disk at my VM and convert the LV root to type RAID1 , but now after restart it’s doesn’t boot anymore.
Give error :

FATAL : Module dm_raid not found

and as consequence :

Can't process LV root : raid1 target support missing from kernel ?

How I workaround this ?
I tried at grub boot , edit the options and added :

insmod lvm
insmod mdraid1x
insmod raid5rec

But not help…

So any hope ?

Thank’s
Cesar

2

You need to recreate initrd so it includes necessary kernel modules. It has nothing to do with grub. Boot any live distro/rescue disk, and do approximately

mount /dev/path--to-your-root /mnt
mount /dev/path-to-boot /mnt/boot
mount --bind /sys /mnt/sys
mount --bind /dev /mnt/dev
mount --bind /proc /mnt/proc
chroot /mnt
mkinitrd
3

Thank’s !!! work perfectly !!! (*2)

Just a note , as information for who is trying to use the root FS as LVM RAID5 . The GRUB2 doesn’t work with LVM RAID5 , at other server where I’m installed a fresh 13.1 version and where I’ve configured previously the LV as RAID5 (with rescue disk) , during the install (*1) the GRUB2 not able to install, needs change to GRUB , then works fine.

(*1) to OpenSuse 13.1 installer recognize LVM RAID5 , needs to abort the installer at the first screen, then you will be redirected to a CUI/TEXT menu where need enter into Expert menu and load the dm-raid module. Then start again the installer (thru the same menu).

(*2) this install is old and I become upgrading the distribution, so, the bootloader is GRUB , not GRUB2 … I don’t know if GRUB2 works with LVM RAID1

4

This would be a bug. If you have evidence, please open bug report. But I suspect what you actually mean is “yast does not allow you to install bootloader on LVM” which is something different.

I don’t know if GRUB2 works with LVM RAID1

It works with LVM “mirror” but currently not with LVM “raid1”. Patch was recently posted to add support for raid1; if you think it would be desirable, open bug report.