LTO
(Linear Tape Open) A family of open magnetic tape standards developed by HP, IBM and Quantum (formerly the Certance subsidiary of Seagate) that are licensed to third-party vendors. LTO cartridges contain a memory that stores historical usage data. Although the first LTO tapes had a native capacity of 100GB, LTO-5 reached 1.5TB in 2010. Starting with LTO-3, LTO drives added write once-read many (WORM) support, and LTO-4 built in hardware encryption. See WORM.LTO Is Ultrium
In 1998, two formats were announced: a single-hub Ultrium, like DLT cartridges, and a dual-hub Accelis, similar to Magstar MP. Sharing read/write head, track layout and other features, the single-hub Ultrium was accepted, while Accelis never took off. For information, visit www.lto-technology.com. See DLT and Magstar MP.
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| An LTO (Ultrium) Cartridge |
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| The single-hub Ultrium is the only LTO format, and LTO and Ultrium are synonymous. |
LTO Ultrium Native Year Hardware Generation Capacity Released WORM Encryption LTO-1 100GB 2000 LTO-2 200GB 2003 LTO-3 400GB 2005 X LTO-4 800GB 2007 X X LTO-5 1.5TB 2010 X X
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