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A tape drive is a data storage device that reads and writes data on a magnetic tape. Magnetic tape data storage is typically used for offline, archival data storage. Tape media generally has a favorable unit cost and a long archival stability.
The UNIVAC I was the first general-purpose electronic digital computer design for business application produced in the United States. It was designed principally by J. Presper Eckert and John Mauchly, the inventors of the ENIAC. Design work was started by their company, Eckert–Mauchly Computer Corporation (EMCC), and was completed after the company had been acquired by Remington Rand. In the years before successor models of the UNIVAC I appeared, the machine was simply known as "the UNIVAC".
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The UNIVAC 1105 was a follow-on computer to the UNIVAC 1103A introduced by Sperry Rand in September 1958. The UNIVAC 1105 used 21 types of vacuum tubes, 11 types of diodes, 10 types of transistors, and three core types.
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The IBM 729 Magnetic Tape Unit was IBM's iconic tape mass storage system from the late 1950s through the mid-1960s. Part of the IBM 7 track family of tape units, it was used on late 700, most 7000 and many 1400 series computers. Like its predecessor, the IBM 727 and many successors, the 729 used 1/2 inch (12.7 mm) magnetic tape up to 2400 feet long wound on reels up to 10½ inch (267 mm) diameter. To allow rapid tape acceleration, long vacuum columns were placed between the tape reels and the read/write heads to absorb sudden increases in tape tension which would otherwise break the tape. Write protection was provided by a removable plastic ring in the back of the tape reel.
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The UNITYPER was an input device for the UNIVAC I computer manufactured by Remington Rand, which went on sale in mid-1951 but was not in operation until June 1952. It was an early direct data entry system. The UNITYPER accepted user inputs on a keyboard of a modified Remington typewriter, then wrote that data onto a metal magnetic tape using an integral tape drive. The UNITYPER II was an input device for the UNIVAC II.
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The DATAmatic 1000 is an obsolete computer system from Honeywell introduced in 1957. It uses vacuum tubes and crystal diodes for logic, and featured a unique magnetic tape format for storage.
References
- ↑ "Tracking the history of magnetic tape: A game of noughts and crosses".
- ↑ Welsh, H. F. & Lukoff, H (1952). "The Uniservo - Tape Reader and Recorder" (PDF). American Federation of Information Processing Societies.
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