Track following control methof of hard disk drive and apparatus therefor

A track following control method of an HDD(Hard Disc Drive) and an apparatus suitable for the same are provided to optimize track following operation in respective modes by using an estimator and a controller suitable for a write mode and a read mode. A write mode estimator(302a) and a write mode controller(302b) correspond to a write mode of an HDD. A read mode estimator(304a) and a write mode controller(304b) correspond to a read mode of the HDD. The first and the second selectors connect the write mode estimator(302a) and the write mode controller(302b) to a head driving device in the write mode. The first and the second selectors connect the read mode estimator(304a) and the write mode controller(304b) to the head driving device in the read mode.