DATA TAPE CARTRIDGES
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A Bit Of Data Storage Tape History
Linear Tape-Open (or 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. Seagate, Hewlett-Packard, and IBM initiated the LTO Consortium, which directs development and manages licensing and certification of media and mechanism manufacturers. The standard form-factor of LTO technology goes by the name Ultrium, the original version of which was released in 2000 and could hold 100 GB of data in a single cartridge. The most recent version was released in 2007 and can hold 800 GB in the same size cartridge. Since 2002, LTO has been the best selling "super tape" format and is widely used with small and large computer systems, especially for backup.
Digital Data Storage (DDS) is a format for storing and backing up computer data on magnetic tape that evolved from Digital Audio Tape (DAT) technology, which was originally created for CD-quality audio recording. In 1989, Sony and Hewlett Packard defined the DDS format for data storage using DAT tape cartridges. Tapes conforming to the initial DDS format can be read by either DAT or DDS tape machines. However, most DDS tape drives cannot retrieve the audio stored on a DAT cartridge. DDS uses tape with a width of 3.8mm, with the exception of the latest format, DAT 160, which is 8mm wide. Initially, the tape was 60 or 90 meters long, although advancements in materials technology have allowed the length to be increased significantly in successive versions. A DDS tape drive uses helical scanning for recording, the same process used by a video cassette recorder (VCR). There are two read heads and two write heads. The read heads verify the data that has been written (recorded). If errors are present, the write heads rewrite the data. A DDS cartridge needs to be retired after 2,000 passes or 100 full backups. Tape drives should be cleaned regularly to be kept in good working order. DDS tapes have an expected life of at least 10 years. Backward compatibility between newer drives and older tapes is not assured. See HP's compatibility matrix: Compatibility Matrix Notice in HP's article that newer tape standards do not simply consist of longer tapes. For example, the track is narrower in DDS2 than in DDS1. The DDS format competes mainly against the LTO, AIT, VXA, and Travan formats.
VXA is a tape backup format originally created by Ecrix and now owned by Tandberg Data. After the merger between Ecrix and Exabyte, VXA was produced by Exabyte Corporation. On November 20, 2006, Exabyte was purchased by Tandberg Data. Exabyte and Ecrix describe the data format as "packet" technology as opposed to "linear" technology. This is a variation on helical scan technology. Instead of writing data in continuous, predefined linear tracks, data is written in addressable packets along the tape. The claim is that this gives better reliability and error recovery as well as being able to adapt to different data rates. The VXA format competes mainly against the DDS, SLR, AIT, Travan, and DLT-V formats.
Scalable Linear Recording is the name used by Tandberg Data for its line of QIC based tape drives. The earliest SLR drive, the SLR1, has a capacity of 250 MB, while the latest drive, the SLR400, has a capacity of 200 GB. The term SLR is now often used to refer to QIC tapes, as they are the only drives still manufactured that use them.
Data Tape Media Cartridges By Sony, Quantum, HP And Exabyte TandbergOnly the best brands of storage tape cartridge media are sold here. Keeping your data safe, all with free UK Delivery
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