^ Maximum uncompressed speeds valid for full height drives.^ Previously unused LTO-7 tape, not an independent generation, part of LTO-8 generation.Time to write a full tape at max speed(hh:mm) Between generations, there are strict compatibility rules that describe how and which drives and cartridges can be used together. Īs of 2020, nine generations of LTO Ultrium technology have been made available and five more are planned. Only the full length 100 GB tapes were produced. The first generation of Ultrium tapes were going to be available with four types of cartridge, holding 10 GB, 30 GB, 50 GB, and 100 GB. In common usage, LTO generally refers only to the Ultrium form factor. As of 2008, LTO Ultrium was very popular and there were no commercially available LTO Accelis drives or media. The real-world performance never exceeded that of the Ultrium tape format, so there was never a demand for Accelis and no drives or media were commercially produced. IBM's (short-lived) 3570 Magstar MP product pioneered this concept. The other proposed format was Accelis, developed in 1997 for fast access to data by using a two-reel cartridge that loads at the midpoint of the 8 mm wide tape to minimize access time. Generations The LTO logoĭespite the initial plans for two form-factors of LTO technology, only Ultrium was ever produced. In 2000, and around the time of the release of LTO-1, Seagate's magnetic tape division was spun off as Seagate Removable Storage Solutions, later renamed Certance, which was subsequently acquired by Quantum. Initial plans called for two LTO formats: Ultrium with half-inch tape on a single reel, optimized for high capacity, and Accelis with 8 mm tape on dual reels, optimized for low latency. Much of the technology is an extension of the work done by IBM at its Tucson lab during the previous 20 years. To counter this, IBM, HP and Seagate formed the LTO Consortium, which introduced a more open format focusing on the same mid-range market segment. Consequently, there was little competition between vendors and the prices were relatively high. These technologies were (and still are) tightly controlled by their owners. Sony followed this success with their own now-discontinued 8 mm data format, Advanced Intelligent Tape (AIT).īy the late 1990s, Quantum's DLT and Sony's AIT were the leading options for high-capacity tape storage for PC servers and UNIX systems. In the late 1980s, Exabyte's Data8 format, derived from Sony's dual-reel cartridge 8 mm video format, saw some popularity, especially with UNIX systems. DEC originally called theirs CompacTape, but later it was renamed DLT and sold to Quantum Corporation. IBM called its format the 3480 (after the 3480, the one product that used it) and designed it to meet the demanding requirements of its mainframe products. Although the physical tape was nominally the same size, the technologies and intended markets were significantly different and there was no compatibility between them. In the mid-1980s, IBM and DEC put this kind of tape into a single reel, enclosed cartridge. Half-inch (12.7 mm) magnetic tape on open reels has been used for data storage since the 1950s, starting with the IBM 7-track and later IBM 9-track. LTO is widely used with small and large computer systems, especially for backup. Upon introduction, LTO Ultrium rapidly defined the super tape market segment and has consistently been the best-selling super tape format. The ninth generation of LTO Ultrium was announced in 2020 and can hold 18 TB in a cartridge of the same physical size. The standard form-factor of LTO technology goes by the name Ultrium, the original version of which was released in 2000 and stored 100 GB of data in a cartridge. Hewlett Packard Enterprise, IBM, and Quantum control the LTO Consortium, which directs development and manages licensing and certification of media and mechanism manufacturers. Linear Tape-Open ( LTO) is a magnetic tape data storage technology originally developed in the late 1990s as an open standards alternative to the proprietary magnetic tape formats that were available at the time.
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