Cheol-hoon Park

Method for measuring track width of hard disk drive

Method and apparatus for driving spindle motor using adaptive feedforward control

Method and apparatus for suppressing resonance of hard disk drive using notch filter

Method of determining size of error and write control method for hard disc drive, hard disc drive using the write control method, and media storing computer programs for executing the methods

Write control method of hard disk drive, hard disk drive adapting the method and recording medium thereof

Apparatus, medium, and method with seek servo control considering temperature change

Seek servo control method for adapting to supply voltage variation and disk drive using the same

Method, medium, and apparatus controlling current gain change of a spindle motor driver

Method, medium, and apparatus controlling track seek in a recording and/or reproducing apparatus

Method, medium, and apparatus compensating for torque variations based on temperature

Method of testing servo burst signals of hard disk drive and recording medium adapted therefor

Method and apparatus for compensating for torque change in seek servo

Apparatus and method for unlatching a head within a data storage device

Method of measuring compensation value for short track seeking in hard disc drive and method of compensating for bias using the same