What is virtual tape? A virtual tape system is a storage device that uses rotational disk to emulate physical tape drives and tape libraries. It is desirable to use disk as a storage media because it is much faster than traditional tape drives and also more dependable and flexible. Virtual tape systems look just like tape drives and tape libraries to the operating system; tapes can be mounted, scratched and used just like a real tape. Virtual tape systems come in many different form factors Dynamic Solutions International sells both self-contained appliances and head units that attach to external RAID disk systems and use either Fibre Channel or iSCSI to attach to servers or storage networks.