ThinkServer always meets the demand on performance enhancement and feature enablement by continuous improvement on products and options. Upgrading your systems with the new options will bring you great values with flexibility, scalability, field-proven reliability.Slim DVD DVD-RW Optical Disk Drive supports following types of media: CD-R, CD-ROM, CD-RW, DVD-R, DVD-R(dual-layer recording), DVD-RAM, DVD-RW, DVD+R, DVD+R(dual-layer recording), and DVD+RW DVD-ROM Optical Disk Drive supports following types of media: CD-R, CD-ROM, DVD-R, DVD-R(dual-layer recording), DVD+R, DVD+R(dual-layer recording)