5¼-inch disks formatted for use with Apple II computers would be unreadable and treated as unformatted on a Commodore. In addition, there are many subtle, usually software-driven incompatibilities between the two.
Drive assemblies with both 3½-inch and 5¼-inch slots were available during the transition period between the sizes, but they contained two separate drive mechanisms. Main articles: Floppy disk format and List of floppy disk formatsĭifferent sizes of floppy disks are mechanically incompatible, and disks can fit only one size of drive. The first commercial micro floppy disk drive was the Sony OA-D30V, released in 1981. Sony invented the 3½-inch floppy disk format, called the micro floppy disk.
Sord Computer Corporation's M200 Smart Home Computer, released in 1977, was among the first home computers, and was an early personal computer to be integrated with a built-in floppy disk drive. The term "floppy disk" appeared in print as early as 1970, and although in 1973 IBM announced its first media as "Type 1 Diskette" the industry continued to use the terms "floppy disk" or "floppy". These disks and associated drives were produced and improved upon by IBM and other companies such as Memorex, Shugart Associates, and Burroughs Corporation. įloppy disks became commercially available in 1971 as a component of IBM products and then were sold separately beginning in 1972 by Memorex and others. He licensed a number of patents to IBM, reaching licensing agreements with them in the 1970s. Nippon Columbia planned to commercialized his magnetic disc sheet recorder in 1960. He later received a Japanese patent in 1952, and a 1958 American patent, for a magnetic disk record sheet.
The first floppy disk was invented by Yoshiro Nakamatsu at the Tokyo Imperial University in 1950. While floppy disk drives still have some limited uses, especially with legacy industrial computer equipment, they have been superseded by data storage methods with much greater capacity, such as USB flash drives, flash storage cards, portable external hard disk drives, optical discs, ROM cartridges and storage available through computer networks. These formats are usually handled by older equipment. By the late 2000s, computers were rarely manufactured with installed floppy disk drives 3½-inch floppy disks can be used with an external USB floppy disk drive, but USB drives for 5¼-inch, 8-inch, and non-standard diskettes are rare to non-existent. Floppy disks are read and written by a floppy disk drive (FDD).įloppy disks, initially as 8-inch media and later in 5¼-inch (133 mm) and 3½-inch (90 mm) sizes, were an ubiquitous form of data storage and exchange from the 1970s into the 2000s. A floppy disk, also called a floppy, diskette or just disk, is a type of disk storage composed of a disk of thin and flexible magnetic storage medium, sealed in a rectangular plastic enclosure lined with fabric that removes dust particles.
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