So now I've tried: a different IDE cable, moved the jumper to master, put the device into both slots, tried 2 other drives one sony and another LG, went to the dell site and did a few recomended updates bios A05 to A07 and a 'chipset update' and some kind of driver update plus 2 more small dell utilitys, actually tried playing a cd,dvd the unit will close,spin but the front comms light just blinks(does this on each of the 3 drives I've tried), Dell is useless, they want money, more than I paid for the drive. It's got to be a software or computer issue. It was like ths when I got the computer (it's used). I have XP home edition, when I got it I reformatted the drive with the dell recovery partition thingy which brought it back to right out of the box condition, reloaded everything could I have missed something? The error on startup is 'drive ID: unknown' how does it know the ID? does it download it every time you boot, or is it stored somewhere? The HD and the floppy have ID's on the setup screen.