Instructions
Plug your Xbox 360 into a power socket using the included power brick. You do not need to plug the 360 into a monitor or television to determine the DVD-Rom drive.
Turn on the 360.
Press the "Eject" button located on the left-hand side of the DVD-Rom tray. This will cause the tray to open.
Examine the shape of the hole in the center of the tray. If the hole is shaped like a square that turns into a circle, you have the Toshiba-Samsung drive. If the hole is circular shaped with two small circles notched into the sides, you own a Hitachi-LG DVD drive. If the hole is perfectly circular, you own a BenQ drive.