Constant Angular Velocity

Abbreviated CAV, a means of writing data on an optical disc in which the rotational speed of the disc remains constant regardless of where a particular track is written to or read from. Or, in other words, the same amount of data is contained on a track near the center of the disc than one near the outside edge, that amount being of necessity defined by the size of the inner track. Consequently, data is more densely packed near the center of the disc. Although CAV allows data to be accessed quickly (each track is divided into fixed lengths called sectors, each of which starts at a fixed location), only half the capacity of the entire disc is used, since the outer tracks could conceivably hold more data than the inner tracks. See also Constant Linear Velocity.

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