Dual-booting with EFI
I recently installed Fedora-23 on my machine - twice, on two different partitions. That gives me one to work with, and one to experiment with - and hopefully gives me an available environment to boot into if one of my experiments goes badly wrong.
Sadly, something immediately went badly wrong :-). Fedora, EFI and dual-booting is not a good combination. However setting things up correctly isn’t too hard.