HP Multibay, 24x, 24x, 24x, 140 ms, 125 ms, 13.5 x 138.8 x 132.8 mm HP Multibay. CD write speed: 24x, CD rewrite speed: 24x. CD read speed: 24x. DVD drive average random access time: 140 ms, Access time: 125 ms. Dimensions (WxDxH): 13.5 x 138.8 x 132.8 mm, Compatible operating systems: Microsoft Windows 2000, Windows XP Professional, Windows XP Home. DVD read speed: 8x