Not an iPod engineer… but yah, I think so. Without disk use enabled, that means the iPod is only gonna respond to one thing: iTunes.
And iTunes is only gonna do one of two things:
– if it’s the iTunes that owns the iPod, then it’ll sync up.
– if it’s not, then it’ll prompt you to erase the iPod so you can load your own music.
With disk use enabled, the iPod will allow itself to be looked at by another computer’s OS. And then utilities like senuti know how to circumnavigate and get to the hidden bits (like the music files) which are usually kept separate so users don’t accidentally mess anything up.