CS 121 Lecture Notes - Lecture 31: Readwrite, Linear Density, Disk Density
28 Jul 2020
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As already introduced, the floppy disk consists of a circular malleable surface, covered with magnetic material. The information is stored by introducing magnetic pulses on the disk, and is read according to the same principle. In fact, this principle is the same as that used in magnetic tapes, except that information is stored on both sides of the material on the floppy disk. In the past, there were single-sided discs, and even double-sided discs that had to be rotated manually. The surface of the disc is divided into concentric rings called tracks. They should not be confused with the micro grooves of a vinyl disc, which are completely connected in a spiral shape. In the case of a magnetic disc, the tracks are concentric, and therefore unconnected. In turn, there is a radial division that divides all the tracks into an equal number of portions, called sectors (see figure.
