C7974A LTO-4 Ultrium 1.6 TB Read/Write Data Cartridge LTO-4 and LTO-5 Ultrium offers data encryption for enhanced data security. Durable cartridge designed to minimize wear and debris (important in automation). Superior 'smart grabber' mechanism and mechanical interlock to prevent the leader pin from being pulled inside the tape housing (a key weakness of DLT media). Sensors detect proper connection and prevent leader loss that would ruin the tape. LTO-4 and LTO-5 Ultrium offers data encryption for enhanced data security. Durable cartridge designed to minimize wear and debris (important in automation). Superior 'smart grabber' mechanism and mechanical interlock to prevent the leader pin from being pulled inside the tape housing (a key weakness of DLT media). Sensors detect proper connection and prevent leader loss that would ruin the tape.