I've got a 4 Gigabyte flash drive that I'd like to make bootable. For right now, I need it to boot DOS or DS linux. I'd like to have it boot to grub or something similar so I can select either one.
There are some situations where you'll wish you had one.
Your USB drive can be your emergency toolkit at home and away, and if the host machine supports booting from a USB drive, you can boot to a USB key that you've prepared in advance. USB drives can boot ...
Since MS-DOS doesn't support USB devices, I'd suspect that the BIOS would have to support the device natively as a bootable drive before you could achieve anything like this-- and even then it would ...