Mythbuntu 12.04 - I attempted to move one data drive to a different sata port, now the system doesn't boot (all drives are back to the original sata ports).

I ran boot-repair (using 12.04 live CD, ran the recommended repair) No change, the system doesn't boot.

I can boot the system off a rescue CD, choosing to boot off the correct boot drive. It then runs normally.

From boot-repair:

boot-repair reports:
"The boot files of [Ubuntu 12.04.1 LTS] are far from the start of the disk"

Do I have to create a new boot partition (at the start of the disk) to resolve this?