The iPod is not made to sustain long periods of spinning the hard drive. When playing music, all it needs to do is spin up for a bit every once in a while to read files to the buffer. When you're running the operating system on it, the burden on the hard drive is much more intense. Also, IIRC it is not a very fast hard drive. Since all it does is read music files, I would be surprised it it was anything other 4200rpm (used in notebooks). It could even be less. Running an os on it is not worth it. Get a cheap firewire external drive like someone else said.