[Bug 563895] Re: grub2 fails to boot or install when an LVM snapshot exists

[nutznboltz]

@dblade it's the price that you pay for not doing the SRU work yourself.
The reward for being the one to do the work is that you don't have to
listen to the ones who are doing it for you.  Why not spend some time
learning how to do the work?

I have some information for you:
http://www.youtube.com/watch?v=h1NcFYUS3uA&fmt=18#t=2m52s

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https://bugs.launchpad.net/bugs/563895

Title:
  grub2 fails to boot or install when an LVM snapshot exists

Status in “grub2” package in Ubuntu:
  Fix Released
Status in “grub2” source package in Lucid:
  Fix Committed
Status in “grub2” package in Debian:
  Fix Released

Bug description:
  SRU Justification:

  Impact: When /boot and / are in an LVM VG and a snapshot is made of an
  LVM LV in that VG the system will not boot and grub can not be
  modified (updated, reinstalled) until all snapshots are removed.

  Testcase:

  Binary package hint: grub2

  Steps to reproduce:

  - (Lucid beta2 installed from CD)
  - Take a snapshot of any volume
  - on reboot:
    error: fd0 read error.
    error: no such disk.
    grub rescue>
  - Use the rescue cd to get a root shell
  - Remove the snapshot and reboot
  Now, the system boots. Create a new snapshot to repeat.

  The system has 2 SATA disks in mdadm RAID1 configuration with 1 lvm
  volume on top and no 'normal' partitions.

  Also see Comment #6
  https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/563895/comments/6

  Fix: See debdiff patch
  https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/563895/+attachment/2589269/+files/grub2_1.98-1ubuntu12.1.debdiff

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