METHOD FOR SERVO WRITING, METHOD FOR COMPENSATING PHASE MISMATCH OF SERVO PATTERN AND HARD DISC DRIVE FOR IMPLEMENTING THE METHODS

摘要

PURPOSE: A servo recording method, a phase deviation compensation method of a servo pattern, and an HDD implementing the same are provided to form the servo pattern suitable for a magnetic recording medium with high recording density, thereby making the stable servo control possible. CONSTITUTION: An HDD(Hard Disk Drive)(100) comprises a head disk assembly(120), a driving unit(145), a record reproducing channel(142), a skew calculating unit(143), and a controller(144). The head disk assembly a magnetic recording medium(121) which is pivotally installed and a magnetic head(122) for reproducing the record of the magnetic recording medium. According to a control signal, the driving unit drives the magnetic head. The record reproducing channel applies a servo record signal to the magnetic head or processes a servo reproduction signal. The skew calculating unit calculates the skew angle of a track which the magnetic head faces. The controller controls in order to delay the phase of the servo record signal at the record reproducing channel.