Is a cartridge necessary for DVD-RAM?
No, Singled-sided 4.7GB DVD-RAM media is available as both a bare disc or in removable cartridge from multiple sources. The removable media cartridge can be thought of in the same manner as a tape cartridge or CD jewel case. For media/data protection, storage, archiving or shipment. In the many large DVD library applications where media is seldom handled, bare double-sided 9.4GB media is often used.