Asus DRW-22B2S BLACK/BULK 22X Internal DVD+/-RW Drive Drive Type: Internal DVD+/-RW Dual Layer Drive DVD-R & DVD-R(DL): DAO/Incremental Recording DVD+R & DVD+R (DL): Sequential Write DVD-RW: DAO/Restricted Overwrite/Incremental Recording DVD+RW: Random Write Interface: E-IDE/PATA Random Access Time: DVD - 160ms; CD - 140ms Buffer Memory: 2 MB