Comment 12 for bug 1284196

At the request of Samantha Jian-Pielak, I've run some additional tests. I installed Ubuntu 16.04.2 desktop on a computer using an ASUS P8-H77I motherboard with an American Megatrends 2.31 UEFI and a Toshiba 3TB hard disk, putting a ~700 MB /boot partition at the END of the disk, above the 2 TiB mark. (I did not bother with a BIOS-mode install.) The computer installed and booted fine. I then copied /boot/efi/EFI/ubuntu/ to /boot/efi/EFI/BOOT and renamed shimx64.efi in the target directory to bootx64.efi, so as to make it bootable using the fallback filename for the next step. This step was to move the hard disk to a second UEFI-based computer, built around an MSI A88X-G43 motherboard, which also has an American Megatrends 2.31 UEFI. The installed system booted fine here, too.

Thus, it looks like these two systems do not have a bug that prevents booting from over-2TiB disks. I cannot rule out the possibility of such bugs on other computers, particularly those that use other EFI implementations.