HP LTO-4 Ultrium 1840 tape represents HP 's fourth-generation of LTO tape drive technology capable of storing up to 1.6 TB per cartridge while providing hardware-based data encryption to enable greater levels of security and unprecedented performance. AES 256-bit hardware data encryption provides easy-to-enable security to protect the most sensitive data and prevent unauthorized access of tape cartridges. By using Ultrium 1840 hardware data encryption - not only is data fully capable of being compressed therefore maximizing capacity - encrypted backups are completed without a loss in performance. Capable of data transfer rates up to 240 MB/sec - HP 's exclusive data rate matching feature further optimizes performance by matching speed of host to keep drives streaming and increase the reliability of the drive and media.