The Genius said "according to Apple" there is no way to transfer music from an iPod to a hard drive it did not originate from.

So, there must be a way. It would be nice of them to do that, since it's a product failure issue. I'm told that the only way to add music to an iPod is to wipe it clean and reload what was on it again; all from the same hard drive, and that it will put a track back on that hard drive if it has been accidently deleted. But, if your hard drive fails, you're up a creek.