a disk is formatted (or initialized), the Disk Operating System
places tracks, sectors and bytes in a specific pattern upon the
concentric (having the same center) circles placed upon the
disk. Sectors are subdivided sections of each track (in red).
Bytes are further subdivisions of the sectors (in blue).
The number of
tracks, sectors and bytes is unique to the specific operating
systems. For example, the number of tracks placed on a
disk from a Macintosh operating system is different than that of
a PC operating system.