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The ability to improve a disk file's access-time performance is severely limited by an inverse fourth-power increase in actuator-power dissipation. Two areas are germane to the actuator-power problem: the design of the actuator coil and the design of the control trajectory. Design considerations for optimal solutions in both of these areas are presented. Utilization of power-optimal control in concert with a power-optimized actuator makes possible a head/disk assembly with improved seek-time performance.>
E. Cooper (Sun,) studied this question.