Long-lasting data protection with M-DISC™ SupportThe M-DISC™uses a patent rock-like recording surface instead of organic dye to etch your records for a lifetime. The M-DISC had been tested and proven to outlast a standard DVD-R. LG M-Ready Drive is the one and only drive for burning the M-DISC and offers the best archival storage solution. The LG GS40N Ultra Slim internal DVD Writer features DVD and CD buring capabilities and M-DISC(DVD) support. M-DISC offers superior reliability in data storage that provides the permanent optical data storage solution. The GS40N gives you the option to choose the media best suited for each task. GS40NDVD Drive for Notebooks (9.5mm, slot)SuperMulti Slim Internal DVD-WSpeedsWriteRead DVDCDBDDVDCDBD-R8x24x-8x24x-R DL6x-8x-RW6x24x-8x24x-ROM-8x24x-RAM5x-6x-+R8x-8x-+R DL6x-8x-+RW8x-8x-RE (SL)-BDXL-M-DISC4x-8x-Features/InformationTypical Access TimeCD-ROM140msDVD-ROM16msDVD-RAM260msBD-ROM-Buffer0.75MBInterfaceSATAMounting optionHorizontal/VerticalExternal Dimensions (W x D x H)128 mm x 127 x 9.5 mm