http://www.engadget.com/entry/8817137592535661/

LITERAL:
This week’s HOW-TO is a handy one for the Mac folks out there who want to run multiple operating systems, but not install them to their hard drive, all using an iPod as a bootable FireWire drive. This HOW-TO is also helpful for trying out new software (on another OS), running developer versions of Mac OS (like Mac OS X Server or Tiger) as well as having a way to repair your Mac if for some reason it cannot boot on its own. At the end of this article, we also point to a way to simply back up your home directory (or anything else to your iPod) which can be handy too, and even used in conjunction with this HOW-TO).

Fuente: http://www.engadget.com/