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