Sony Optiarc AD-5170. CD write speed: 48 x, CD rewrite speed: 32 x, DVD+R write speed: 18 x. CD read speed: 48 x. DVD drive average random access time: 160 ms, Access time: 140 ms. Drive device, buffer size: 2 MB, Optical drive type: DVD-RW, Interface: EIDE/ATA. Media types supported: DVD-ROM, DVD-R (DL ), DVD-RW, DVD+R, DVD+RW,DVD+R9,CD-ROM, CD-R, CD-RW 80mm/120mm, Write methods: DAO, SAO, TAO zero gap, variable / fixed packet, multisession