@jihadjimmy @VIPPER MBR is pretty crappy and has limited spaces, plus no proper partition formation, but it at least doesn't restrict what software you can boot.

MBR is only ever usable when GNU GRUB's MBR shim is installed into the MBR, but you need to also install Grub into the boot partition as well.


GNUboot is superior, as it comes with GRUB by default, so you don't need a MBR or to install grub - plus with a certain configuration you don't even need a boot partition and you can just put everything into one partition and GRUB will be able to find the /boot dir just fine.