I have this problem with an old machine where the BIOS does not
recognize the full size of the hard disk.

The machine is a Dell Inspiron 6000 laptop and the BIOS recognizes the
disk as 137GB even though it is really 250GB.

Grub2 won't boot off a partition that goes beyond where the BIOS sees
the end of the disk, which is how Ubuntu is installed by default (with a
single large partition).

I can work around the problem by using manual partitioning during the
installation and making sure that /boot is on a partition that is in the
first 137GB of the drive - in my case I created a separate 1GB partition
at /dev/sda1 and mounted it as /boot.

My source of inspiration was http://www.dudek.org/blog/220

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https://bugs.launchpad.net/bugs/477430

Title:
  grub 2 error: out of disk. failed to boot default entries. press any
  key to continue...

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