I have a TiVo HD and I replaced the internal drive 3 years ago with a Seagate ST31000340NS Barracuda ES.2 1TB - post here. I work in computer storage, and that drive had a firmware update a long time ago (2+ years) that fixes a major issue. Before the TV season starts in a month I would like to update the firmware on the drive. Is there any technical reason that the TiVo box itself would have a problem with me upgrading the firmware of the drive? I don't know if it has any sort of firmware checks to see if it's changed or not, or if it will care if it has been changed.