Sony Optiarc BC-5500H. CD write speed: 16 x, CD rewrite speed: 10 x, DVD-R9 write speed: 4 x. CD read speed: 24 x, DVD+R read speed: 8 x, DVD-R read speed: 8 x. DVD drive average random access time: 200 ms, CD-ROM drive average random access time: 190 ms, BD-ROM average random access time: 320 ms. Disc loading type: Tray, Drive device, buffer size: 4.5 MB, Interface: Serial ATA. Write methods: BD-ROM, BD-AV, DVD-ROM, DVD-Video, CD-DA, CD-ROM (XA), CD Extra, Video CD, Photo CD, CD Text, Optical disk diameter: 120 mm