DDS/DAT is considered the most reliable & durable format of all the tape technologies. DAT320, the latest generation, uses ME (Metal Evaporated) media that has an excellent reliability record. This is achieved through a number of design features, such as a DLC (Diamond Like Coating) layer over the magnetic layer & a lubricant that is applied on top of the DLC layer. These, & other features, enable DAT320 media to achieve excellent durability & a 30-year archival life.