[Bug 999076] Re: Upgrade vom 10.04 LTS Server to 12.04 LTS Server breaks grub

[Phillip Susi]

I think you left the original metadata in place so both sets are being
recognized.  Try using dd to zero the sectors from the end of the
partition to the end of the drive.

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Title:
  Upgrade vom 10.04 LTS Server to 12.04 LTS Server breaks grub

Status in “grub2” package in Ubuntu:
  Incomplete

Bug description:
  I tried to upgrade a server, and i was left with a broken grub2. I
  think it has to do something with LVM/RAID.

  My setup: /root lies on LVM which is on a Raid5. There's not separate
  boot partition.

  When i reinstall grub2 from the command-line i get the following
  errors:

  ...

  Setting up grub-pc (1.99-21ubuntu3) ...

  Creating config file /etc/default/grub with new version
  error: found two disks with the index 0 for RAID md0.
  error: found two disks with the index 3 for RAID md0.
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  error: found two disks with the index 0 for RAID md0.
  error: found two disks with the index 3 for RAID md0.
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  error: found two disks with the index 0 for RAID md0.
  error: found two disks with the index 3 for RAID md0.
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  error: found two disks with the index 0 for RAID md0.                                                                                                                                                                              
  error: found two disks with the index 3 for RAID md0.
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  error: found two disks with the index 0 for RAID md0.
  error: found two disks with the index 3 for RAID md0.
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  /usr/sbin/grub-probe: error: unknown filesystem.
  Auto-detection of a filesystem of /dev/mapper/lvm-root failed.

  Try with --recheck.
  If the problem persists please report this together with the output of "/usr/sbin/grub-probe --device-map="/boot/grub/device.map" --target=fs -v /boot/grub" to <bug-grub at gnu.org>
  error: found two disks with the index 0 for RAID md0.
  error: found two disks with the index 3 for RAID md0.
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  error: found two disks with the index 0 for RAID md0.
  error: found two disks with the index 3 for RAID md0.
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  /usr/sbin/grub-probe: error: unknown filesystem.
  Auto-detection of a filesystem of /dev/mapper/lvm-root failed.
  Try with --recheck.
  If the problem persists please report this together with the output of "/usr/sbin/grub-probe --device-map="/boot/grub/device.map" --target=fs -v /boot/grub" to <bug-grub at gnu.org>
  error: found two disks with the index 0 for RAID md0.
  error: found two disks with the index 3 for RAID md0.
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  error: found two disks with the index 0 for RAID md0.
  error: found two disks with the index 3 for RAID md0.
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  /usr/sbin/grub-probe: error: unknown filesystem.
  Auto-detection of a filesystem of /dev/mapper/lvm-root failed.
  Try with --recheck.
  If the problem persists please report this together with the output of "/usr/sbin/grub-probe --device-map="/boot/grub/device.map" --target=fs -v /boot/grub" to <bug-grub at gnu.org>
  error: found two disks with the index 0 for RAID md0.
  error: found two disks with the index 3 for RAID md0.
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  error: found two disks with the index 0 for RAID md0.
  error: found two disks with the index 3 for RAID md0.
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  /usr/sbin/grub-probe: error: unknown filesystem.
  Auto-detection of a filesystem of /dev/mapper/lvm-root failed.
  Try with --recheck.
  If the problem persists please report this together with the output of "/usr/sbin/grub-probe --device-map="/boot/grub/device.map" --target=fs -v /boot/grub" to <bug-grub at gnu.org>
  error: found two disks with the index 0 for RAID md0.
  error: found two disks with the index 3 for RAID md0.
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  error: found two disks with the index 0 for RAID md0.
  error: found two disks with the index 3 for RAID md0.
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  error: superfluous RAID member (4 found).
  /usr/sbin/grub-probe: error: unknown filesystem.
  Auto-detection of a filesystem of /dev/mapper/lvm-root failed.
  Try with --recheck.
  If the problem persists please report this together with the output of "/usr/sbin/grub-probe --device-map="/boot/grub/device.map" --target=fs -v /boot/grub" to <bug-grub at gnu.org>

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