Arch Linux

AlmostSurelyRob

Member

From: UK

Registered: 2012-03-17

Posts: 77

[SOLVED] GRUB2+GPT+LVM: unable to boot after upgrade

Dear All,

I have recently upgraded an Arch computer. The update was successful but the computer no longer boots. I can get to Grub 2 menu but after selecting a system I get:

error: no such device: ad4103fa-d940-48ca-8506-301d8081d467
Loading Linux core repo kernel ....
error: no such partition.
Loading initial ramdisk ...
error: you need to load the kernel first.

I recall that both dev-mapper and grub-bios were changed in my upgrade. I must confess I am completely lost. I have found a couple of posts but none of them seem to resemble my situation:
https://bbs.archlinux.org/viewtopic.php?id=101753
https://bbs.archlinux.org/viewtopic.php?id=121620

My other computer running Arch was ok on the same upgrade but the other one does not have GRUB2+LVM+softRAID, so I thought this is the issue. I booted with USB stick and run lvdisplay - I can still see all of my partitions intact, but I am not sure how to mount them a simple mount /dev/Raid0Volume/lvroot does not work

mount /dev/Raid0Volume/lvroot /mnt
mount: special device /dev/Raid0Volume/lvroot does not exist

Please let me know if you can provide any assistance on this matter.

Last edited by AlmostSurelyRob (2012-08-08 23:18:02)

tr!x0r

Member

From: Belgium

Registered: 2010-12-31

Posts: 55

Website

Re: [SOLVED] GRUB2+GPT+LVM: unable to boot after upgrade

If you live boot, you have to enable them, "vgchange -a y" puts them in an active state.
This will allow you to mount them and check if everything is OK, or chroot and repair your grub.

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Remember, when using Linux, you're the one in control
http://www.linux-answered.com

AlmostSurelyRob

Member

From: UK

Registered: 2012-03-17

Posts: 77

Re: [SOLVED] GRUB2+GPT+LVM: unable to boot after upgrade

Thanks. That helped a lot. I mounted my LVs and reinstalled grub. After that I started getting the following error:

/sbin/lvm: error while loading shared libraries: libudev.so.0: cannot open shared object file: No such file or directory

After looking around at Arch Forum a bit I have found this post:
https://bbs.archlinux.org/viewtopic.php?id=142628
The solution given there worked for me i.e. live boot, chroot and then run

mkinitcpio -p linux

Last edited by AlmostSurelyRob (2012-08-08 23:19:59)

tr!x0r

Member

From: Belgium

Registered: 2010-12-31

Posts: 55

Website

Re: [SOLVED] GRUB2+GPT+LVM: unable to boot after upgrade

Nice to hear that everything works again!

Feel free to put it on solved! :-)

Cheers!

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Remember, when using Linux, you're the one in control
http://www.linux-answered.com