[Bug 580851] Re: 10.04 alternate install creates unbootable system

[vbooh]

*** This bug is a duplicate of bug 506670 ***
    https://bugs.launchpad.net/bugs/506670

** This bug has been marked a duplicate of bug 506670
   >2TB/GPT: Must warn if BIOS boot partition is missing (unbootable system!)

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https://bugs.launchpad.net/bugs/580851

Title:
  10.04 alternate install creates unbootable system

Status in “grub2” package in Ubuntu:
  New

Bug description:
  Hi,

  I just tried to install 10.04 (AMD64) with the alternate install disk
  on a system with two 2TB disks (WD 20EARS), trying to do as usual:

  - a boot partition mounted under /boot (around 300MB) with ext4 on a raid1 consisting of /dev/sda1 and /dev/sdb1
  - a main partition mounted under / with ext4 on an LVM partition on a raid1 consisting of /dev/sda2 and /dev/sdb2

  (I'm using this method for years without problems, but for the first
  time with such large disks, I just got them yesterday)

  but now the process of installing grub onto these disks failed without
  precise error message. The install disk just reported the system to be
  unbootable.

  Booting the system with the desktop system and trying to install grub
  manually showed the problem:

  Because of the disk size the installer CD had automatically chosen a
  GPT partition table, on which grub does not find it's place to embed
  itself. If then the boot partition is on a raid device, grub2 can't
  install itself.

  grub-setup gives the error messages:

  warn: This GPT partition label has no BIOS Boot Partition; embedding won't be possible!.
  error: embedding is not possible, but this is required when the root device is on a RAID array or LVM volume.

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