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Minimizing power dissipation in a disk file actuator

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1 Author(s)
E. S. Cooper ; IBM Corp., San Jose, CA, USA

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.

Published in:

IEEE Transactions on Magnetics  (Volume:24 ,  Issue: 3 )