Sony Optiarc AD-7261S-01. CD write speed: 48 x, CD rewrite speed: 32 x, DVD+R write speed: 24 x. CD read speed: 48 x. DVD drive average random access time: 160 ms, CD-ROM drive average random access time: 140 ms. Disc loading type: Tray, Drive device, buffer size: 2 MB, Interface: Serial ATA. Media types supported: DVD-ROM, DVD-R (DL), DVD-RW, DVD-RAM, DVD+R9, DVD+RW, CD-ROM, CD-R, CD-RW, Optical disk diameter: 80 mm