Thompson Xbox DVD Drives
The Thompson brand DVD drives were included with Xbox consoles when they were originally produced. The Thompson drive is indicated by a round, U-shaped disc tray.
Phillips
The Phillips DVD drives were included in Xbox consoles in 2002. The Phillips drive in the Xbox has a U-shaped disc tray that opens in to a wider circle in the middle.
Samsung
Samsung DVD drives were included in Xbox consoles starting in late 2002. They can be indentified by a narrower, rectangular disc tray opening. Samsung drives have two small holes on the left and right of the disc tray.