The term density has a double meaning for floppy disks. TPI was not a part of the physical manufacturing process it was a certification of how closely tracks of data could be spaced on the medium safely. In the early 2000s, most floppy disk types and formats became obsolete, leaving the 3 + 1⁄ 2-inch disk, using an IBM PC compatible format of 1440 KB, as the only remaining popular format.ĭifferent floppy disk types had different recording characteristics, with varying magnetic coercivity (measured in oersteds, or in modern SI units in amperes per meter), ferrite grain size, and tracks per inch (TPI). Since their introduction, there have been many popular and rare floppy disk types, densities, and formats used in computing, leading to much confusion over their differences. Logical and physical layout of data in a floppy diskįloppy disk format and density refer to the logical and physical layout of data stored on a floppy disk.
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