A track following control apparatus and method for a hard disk drive (HDD) is disclosed and includes an estimator receiving a position error signal from a HDA and generating estimated state information for a magnetic head in response to the position error signal, and a controller receiving the estimated state information and generating a control signal controlling operation of the HAD, wherein the estimator and controller are variably configured according to a write mode or a read mode.

 
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< Magnetic recording medium, recording/reproducing apparatus, and stamper

> Asymmetry correction in read signal

> Magnetic recording medium and magnetic recording/reproducing apparatus

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