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(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 LTO was introduced with a native capacity of only 100GB, multi-terabyte tapes followed. Starting with LTO-3, write once-read many (WORM) support was added, and LTO-4 built in hardware encryption (see table below). 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 See DLT and Magstar MP.

An LTO (Ultrium) Cartridge
The single-hub Ultrium is the only LTO format, and LTO and Ultrium are synonymous.

LTO UltriumGeneration    Native         Hardware  (year)     Capacity  WORM  Encryption

  LTO-1 (2000)  100GB
  LTO-2 (2003)  200GB
  LTO-3 (2005)  400GB      X
  LTO-4 (2007)  800GB      X       X

  LTO-5 (2010)  1.5TB      X       X
  LTO-6 (2012)  2.5TB      X       X
  LTO-7 (2016)  6.0TB      X       X
References in periodicals archive ?
Fujifilm has launched an LTO-5 data cartridge with a 3TB capacity (at 2:1 compression; 1.
Tokyo, Aug 10, 2010 - (ACN Newswire) - Fujitsu today announced that its ETERNUS LT20, LT40 and LT60 tape libraries will be equipped with the next generation of LTO tape drives, LTO-5.
Customers will benefit from the technology upgrade in many ways: providing up to 3 TB of storage capacity, as each LTO-5 tape reduces the number of tapes needed in total and enables industry leading capacities of almost twice that of LTO-4 and four times that of LTO-3.
lt;p>Imation is the first company to license the Ultrium LTO-5 tape media.
With the introduction of LTFS for our video archive, we've been able to utilize LTO-5 tape to significantly reduce our storage costs, improve our scalability, ease of use and reliability over our previous systems," said Jamie Morganstern, BAMM.
With general availability of LTO-6 tape drives and media expected in 2012, customers can now join the LTO-6 pre-purchase program and receive LTO-5 drives today for use until LTO-6 drives become available.
LTO-6 drives are designed with backwards-compatible read-and-write capability with LTO-5 cartridges, and backward read capabilities with LTO-4 and LTO-5 cartridges, to ensure investment protection and to ease deployment.
Spectra Logic, celebrating 30 years of data storage innovation, announced today that it is now shipping LTO-5 drives and Spectra certified LTO-5 media cartridges in its T-Series tape libraries.
LTO-5 media cartridges have a native capacity of 1.
Tape Manufacturers to Support LTO-5 Technology and the Ultrium Format Capacity, Performance, and Feature Enhancements
Customers who select the LTO-5 pre-purchase option can receive an LTO-4 drive today for use until LTO-5 drives become available.
Spectra Logic's LTO-5 pre-purchase program is an economical choice that will allow us to scale up without worry," said John Funke, manager of network engineering, ON24 Inc.