LTO LTO Ultrium Universal Cleaning Cartridges are designed specifically for use in all LTO Ultrium 1, 2, 3, 4, 5, 6 and 7 drives and are compatible with libraries designed for LTO Ultrium 1, 2, 3, 4, 5, 6 and 7 drives. The LTO Ultrium system is based on the industry's first open data storage platform. The LTO consortium comprised of drive manufacturers HP, IBM and Quantum developed this technology to meet the increased midrange and enterprise storage demands analysts predict over the next decade.