This is a HP SureStore CD/DVD-ROM Server. It is rackmountable, includes HP thin server and seven HP DVD-ROM drives, reads DVD-ROM media as well as CD-ROM, CD-R and CD-RW , has a connect to a CD Expansion tower to add seven CD drives. HP SureStore CD/DVD-ROM Servers are part of the HP Network Attached Storage (NAS) family. They are built on proven HP thin-server technology allowing the CD or DVD server to be attached directly to the network, not the general purpose file server. The net result: less installation time, less management time, and less time accessing important CD or DVD information.