[Bug 972250] Re: regression from 4k_sectors.patch: "non-sector-aligned data is found in the core file"

[Colin Watson]

Which exact error message?  If it's:

  /usr/sbin/grub-setup: warn: Embedding is not possible. GRUB can only
be installed in this setup by using blocklists. However, blocklists are
UNRELIABLE and their use is discouraged.

... then you'll get that any time you try to install GRUB to a partition
rather than the MBR, unless the filesystem on that partition reserves
space for boot loader code (basically, btrfs).  The warning doesn't
indicate a problem that would prevent your system booting next time
round, but rather a general unreliability of this setup against things
like aggressive fsck implementations.

It's only related to this bug if you're also getting "error: non-sector-
aligned data is found in the core file".

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https://bugs.launchpad.net/bugs/972250

Title:
  regression from 4k_sectors.patch: "non-sector-aligned data is found in
  the core file"

Status in “grub2” package in Ubuntu:
  Fix Released

Bug description:
  On a system installed with 11.10 and upgraded to 12.04 last week,
  today grub fails to apt-get upgrade with this error in
  /var/log/apt/term.log:

  /usr/sbin/grub-setup: warn: This GPT partition label has no BIOS Boot Partition; embedding won't be possible!.
  /usr/sbin/grub-setup: warn: Embedding is not possible.  GRUB can only be installed in this setup by using blocklists.  However, blocklists are UNRELIABLE and their use is discouraged..
  /usr/sbin/grub-setup: error: non-sector-aligned data is found in the core file.

  The system has luks+lvm as installed by 11.10 alternative installation
  cd, and indeed seems to have GPT but no BIOS partition (system is
  running BIOS on Asus F1A75V-PRO motherboard).

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