
Originally Posted by
frantaylor
If you have a SSD, it takes only a few seconds to boot.
If you use multiple drives and switch them in the BIOS, you don't have to worry about sharing drives.
You really want an OS to have its own disk. If you share two OS's on one disk, one of them will end up on the inner tracks and will run much more slowly.
Instead of switching in the BIOS, you can put each OS on its own drive and use GRUB to choose. If you are very clever, you can add a small script to each OS that modifies the default GRUB setting, so you can make a "shutdown and reboot as the other OS" button if you want.
Just throwing out some ideas that I've tried here...