Failed GRUB after 10.04 to 12.04 upgrade in system with LVM

Posted by Vagelis L on Ask Ubuntu See other posts from Ask Ubuntu or by Vagelis L
Published on 2012-10-04T07:01:47Z Indexed on 2012/10/14 15:50 UTC
Read the original article Hit count: 223

Filed under:

12.04

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upgrade

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lvm

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grubrescue

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boot-repair

I am using Ubuntu Server as a SMB server at work and two days ago I have tried to upgrade it to 12.04.

After reboot, I got this

grub_xput missing
grub rescue>

and all attempts to start from this prompt failed (missing components, although grub directory is normally set as prefix).

My system sits and boots on an LVM (soft raid-5).

I have read almost all posts in many forums, tried grub rescue, boot-repair, ubuntu-secure-remix with boot-repair but without positive result.

This is the log of my last (and best so far) attempt to fix this system.

Any suggestions? Please help.

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