The IBM LTO Ultrium 4 Tape Drive is the fourth-generation LTO Ultrium tape drive in the IBM TotalStorage LTO Ultrium family of products. The Ultrium 4 Tape Drives and Ultrium 4 cartridges can be resident in the same TS3310 Tape Library with Ultrium 3 tape drives, and with Ultrium 3 and Ultrium 2 data cartridges. The Ultrium 4 Tape Drive offers the following significant improvements: increased performance, larger capacity, Ultrium 3 cartridge compatibility, encryption supported on Ultrium 4 Fiber Channel and SAS tape drives, WORM media support, attachment options, larger internal data buffer, highly integrated electronics using IBM engineered copper technology.