Advertisements So my worst fears have come true. I did a friend a favour by upgrading his Tivo for him with a 180 hour drive (originally had 80 hour). Now he tells me his tuner has died. Tivo has told him they will replace the unit for him at no cost, very nice of Tivo to do that......only problem is I can't find his original drive. I know I will need to get this drive back to him so he can get the replacement. I have my original drive from my 80 hour Tivo. Can I make an image and marry it to his Tivo and use this to "replace" the original drive, or will Tivo know?