Variable control of write parameters for hard disk drive

摘要

A hard disk drive that changes a variable write parameter of a head during a write operation. The controller can change the variable write parameter to compensate for a transient temperature profile of the head during the initial stage of a write operation. By way of example, the controller can provide a relatively large overshoot control signal of a head during the writing of a first sector of a write operation. The value of the overshoot control signal may be decremented for a second sector, a third sector etc., until the head attains a thermal steady state at which point the overshoot control signal is provided with a constant value.