QUOTE(hardrock351w @ May 26 2012, 04:28 PM)

What motherboard does the working box have?...if xennon then odds are the drive would be Hitachi or Samsung.....unless it was sent in for repair by microsoft,....in that case it could be any drive.
Are the rest of the drives broke?? if not just keep plugging them in untill you find one that works.
Thats the quickest way I know of.
one drive has a tray load error but I reflashed the firmware. I believe its a benQ.
I have another benQ with a new laser I put in, but now it makes loud noises when running the motor. I might have a bad laser/motor unit from ebay.
The samsung I purchased new and that's why I've been using it exclusively. Its a ms28 revision. I also have a ms25 revision samsung which doesn't seem to read anything either.
Last time I sent commands to the ms28 Samsung it replied 0x70 and i've not been able to get it to show up for me to push a write to it since then.
I got so far with it all then I hit a wall. I might need to get another "new" drive from the web and try again.
I'll have to do some research regarding which mobo my working 360 has. It's old. I think a xbox 360 arcade edition. One of the first ones to be revised to include hdmi port below the standard av port.
The majority of these systems have been repaired by MS because there's ram heat pads and numerous doodles on the circuit board from whatever tech checked it.
Thanks for the replies!