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A disk is further divided by sectors, which can be visualized as pie slices. The figure below provides a simple representation of tracks and sectors.
A hard disk consists of two or more platters stacked on top of one another and thus has four or more sides. In addition, a hard disk has many more tracks per side than a diskette, but the number of tracks depends on the capacity of the hard disk. The number of sectors depends on the type of hard disk.