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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.
Kennedy Company, often shortened to Kennedy Co., was an American computer storage company active from 1963 to 1988.Founded by Charles J. Kennedy (1920–1996) and based in the Greater Los Angeles area, the company was one of the largest independent manufacturers of magnetic-tape data drives for mainframe and minicomputer users. [1]
The platters are made from a non-magnetic material, usually aluminum alloy, glass, or ceramic. They are coated with a shallow layer of magnetic material typically 10–20 nm in depth, with an outer layer of carbon for protection. [47] [48] [49] For reference, a standard piece of copy paper is 0.07–0.18 mm (70,000–180,000 nm) [50] thick.
The IBM 1405 Disk Storage Unit was announced in 1961 and was designed for use with the IBM 1400 series, medium scale business computers. [25] The 1405 Model 1 has a storage capacity of 10 million alphanumeric characters (60,000,000 bits) on 25 disks. Model 2 has a storage capacity of 20 million alphanumeric characters (120,000,000 bits) on 50 ...
Hard disk with platter Inside view of a hard disk Hard disk drive platter, 2.5" Samsung MP0402H. A hard disk drive platter or hard disk is the circular magnetic disk on which digital data is stored in a hard disk drive. [1]
The IBM 2301 is a magnetic drum storage device introduced in the late 1960s to "provide large capacity, direct access storage for IBM System/360 Models 65, 67, 75, or 85." The vertically mounted drum rotates at around 3,500 revolutions per minute, and has a head-per-track access mechanism and a capacity of 4 MB.
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