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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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2 Answers 2

Reset to default
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Explanation:

The space before your first partitions is 32.3kB (63 Sectors x 512bytes), which is not enough for GRUB2. You are affected by this bug: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1059827

Solution:

  1. Either increase this space via Gparted from 32.3kB to 1049kB for example, for all your disks (sda, sdb,...). Then use Boot-Repair to reinstall GRUB2 in the MBR of all your disks.
  2. OR use Boot-Repair --> Advanced options --> GRUB options --> GRUB Legacy. This will probably work (because GRUB Legacy needs less space), but i don't recommend it because GRUB Legacy is obsolete.
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  • Thanks for you answer! For Nr. 2 solution, I will try it as last resort. For Nr.1, GParted does not (yet) work with LVM. Is there another tool I can use to move the partitions, which supports LVM? Dare I ask for a GUI tool?
    – Vagelis L
    Oct 5, 2012 at 12:37
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And to complete Solution 1, GParted can also be found as a Live CD http://gparted.sourceforge.net/livecd.php

(because, you know, LVM and RAID are only on alternate Ubuntu Boot CD, and Gparted is graphical which means desktop Boot CD...)

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  • Welcome to Ask Ubuntu! Whilst this may theoretically answer the question, it would be preferable to include the essential parts of the answer here, and provide the link for reference.
    – nanofarad
    Oct 14, 2012 at 17:06

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