Today's rapidly expanding networks and information systems require a fast, reliable storage solution. The new DDS-4 format, based on the firmly established DDS media system, is the answer. 40GBÂ¹ in a compact DAT-size cartridge offers more than enough capacity to back up new generation of larger hard disk drives. Very fast transfer rate of 17GB/hour not only assures a safe backup within an ever-shrinking backup window, but also minimizes the downtime while restoring data. Full read and write backward compat..