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. The offering here covers: Lenovo ThinkServer RD350,RD450 Slim SATA DVD-RW Optical Disk Drive 4XA0F28609 Lenovo ThinkServer RD350,RD450 Slim SATA DVD-ROM Optical Disk Drive 4XA0F28610Slim 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)