[Bug 1043096] Re: Use UUID for root file systems on /dev/md*

[Alexandros]

I just ran into some trouble with my desktop LVM/raid setup after
updating my 12.04 installation's udev. I've been searching through
launchpad to find if anyone else has the problem and this seems quite
related. Are changes made to support LVM install in 12.10 being
backported to 12.04? In my first update after 12.10 was release (note: I
am still on 12.04) my LVM/raid setup stopped working because of the way
initrd works (see bug 1074597)

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https://bugs.launchpad.net/bugs/1043096

Title:
  Use UUID for root file systems on /dev/md*

Status in “grub2” package in Ubuntu:
  New

Bug description:
  As part of the ongoing discussion about dropping alternates [1] I
  wanted to find out whether it's currently possible at all to install
  on a RAID with Ubiquity. Turns out it is possible [2], but there are
  two post-installation steps which are not obvious and should be fixed.

  Creating partitions with gparted and building a RAID with mdadm on the
  live system works well. Ubiquity detects the devices and you can
  partition /dev/md0 and install on it just fine. The trouble starts
  because you need to install mdadm into the target system, which is
  covered in bug 1043094.

  After that, booting fails because the generated grub configuration
  hardcodes /dev/md0p1, but initramfs/kernel create it as /dev/md127p1.
  It would be nice if grub/Ubiquity used UUIDs for the root partition as
  usual; in the initramfs /dev/disks/by-uuid/... exists just fine.

  After that, the installed system boots perfectly.

  [1] https://lists.ubuntu.com/archives/ubuntu-devel/2012-August/035675.html
  [2] https://lists.ubuntu.com/archives/ubuntu-devel/2012-August/035680.html

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