I currently have a dual-boot on my desktop with two partitions on the same hard drive. When I boot up my machine I am taken to a boot menu which allows me to pick which of the two operating systems I wish to boot into. I am about to add another hard drive on which I will put a third operating system.
I know that I can go into the BIOS boot menu and choose which hard drive I want to boot from, but this seems a little cumbersome. Is there any way to have a boot menu that aggregates all of the operating systems across all hard drives?
For instance, if I have HDD 1 with operating systems A and B and HDD 2 with operating systems C and D, can I have a boot menu that allows me to pick between booting into operating systems A, B, C, and D all on the same menu?