I wasn't covered by the Nissan Warranty, perhaps the Lexus is different; you never really find out until you ask a dealer to cover something under warranty. If it was a choice between backing-up my disc, which I could do easily, or pouring over my warranty or relying on what my dealer said my warranty covered it was an easy choice. Nothing evil in the air, just wanting to avoid repeating a bad expereince. Hope I don't have to cross that bridge later when I could have taken a different road.
Thanks for the feadback.