)A method of recording data on a hard disk drive whereby the sectors per track on the drive are not consistent across the platter. In general, tracks closest to the center have fewer sectors than tracks toward the outside of the platter where the tracks are larger and can fit more sectors. Though the platter rotates at a constant angular velocity, the clock speed, or clock rate, changes as the read/write head moves from one zone to another along the platter.
Also called zone bit recording.
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