I have a new (to me) Titanium powerbook, that came formatted UFS. The Cube, and my G4-933 are both formatted EFS+. I'm contemplating re-formatting the Powerbook, but I wonder what the differences are - speed, stability, etc before doing anything. There is an article on the Apple site, but it's for 10.2.8 and earlier - I'm running 10.3.4. Ken Johnson