It turns out that the bug (#115980) is a result of a few subtle but key changes within the 2.6 kernel. A certain functionality with regards to hard disk geometry has been pulled out, as the kernel developers thought it would be better if userspace utilities took care of this instead. The Bugzilla bug is related to CHS geometry problems, which most likely stems from an error within the parted utility, addressing the BIOS incorrectly. It turns out that BIOS updates tend to fix problems for many users that have been bitten by this “bug”. On newer machines, this is basically non-reproducible.