A CDE Definition
The distance between recording channels (tracks) on a magnetic or optical surface, as measured from the center of one track to the center of the other. The track pitch determines the "track density," which is the number of tracks per inch (see tpi).
(Tracks Per Inch) The measurement of the density of the storage channels on a disk or tape. Track density on magnetic disks has reached 125,000 tpi (125 Ktpi). See bpi, areal density and track pitch.
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