Advertisements I'm looking at getting an HD unit tomorrow or Monday. I know all about the pixilation issues. I've got 2 scenario questions. I already have a series 2 Sony upgraded to record 270 hrs. Can I replace that hard drive for the one that will be in the HD and then just let itself get updated software wise? Is the Sony Tivo software different from the regular Tivo software? If that's a no go, can I clone the hard drive from the HD unit to a larger drive? I've got a 500 gig drive that I could use. I'd be doing it on an Intel iMac so power isn't an issue. Has anyone with a Mac ever done this? Thanks for the info!