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Magnetic-tape data storage is a system for storing digital information on magnetic tape using digital recording. Tape was an important medium for primary data storage in early computers, typically using large open reels of 7-track, later 9-track tape. Modern magnetic tape is most commonly packaged in cartridges and cassettes, such as the widely ...
StorageTek tape formats. Storage Technology Corporation (marketing as 'StorageTek' [one word]) created several magnetic tape data storage formats. These are commonly used with large computer systems, typically in conjunction with a robotic tape library. The most recent format is the T10000. StorageTek primarily competed with IBM in this market ...
9-track tape is a format for magnetic-tape data storage, introduced with the IBM System/360 in 1964. The 1 ⁄ 2 inch (12.7 mm) wide magnetic tape media and reels have the same size as the earlier IBM 7-track format it replaced, but the new format has eight data tracks and one parity track for a total of nine parallel tracks.
An optical disc is a flat, usually [note 1] disc-shaped object that stores information in the form of physical variations on its surface that can be read with the aid of a beam of light. Optical discs can be reflective, where the light source and detector are on the same side of the disc, or transmissive, where light shines through the disc to ...
Density (computer storage) Density is a measure of the quantity of information bits that can be stored on a given length ( linear density) of track, area of the surface ( areal density ), or in a given volume ( volumetric density) of a computer storage medium. Generally, higher density is more desirable, for it allows more data to be stored in ...
Magnetic storage or magnetic recording is the storage of data on a magnetized medium. Magnetic storage uses different patterns of magnetisation in a magnetizable material to store data and is a form of non-volatile memory. The information is accessed using one or more read/write heads . Magnetic storage media, primarily hard disks, are widely ...
This was accomplished by the TMS9901 support chip, which offered various clock dividers. For cassette operations, the clock divider was set to 17, and the input to the chip was the system's main 3 MHz clock divided by 64. Thus the output of the TMS9901 was 17 / (3 MHz / 64) = 363.6 microseconds, or 2750 Hz.
Digital Audio Tape. Released. 1989; 35 years ago. ( 1989) Digital Data Storage ( DDS) is a computer data storage technology that is based upon the Digital Audio Tape (DAT) format that was developed during the 1980s. DDS is primarily intended for use as off-line storage, especially for generating backup copies of working data.
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