Magnetic disk apparatus, method for determining data track...

Details Magnetic disk apparatus, method for determining data track... Magnetic disk apparatus, method for determining data track...

2006-08-22

2006-08-22

Wellington, Andrea (Department: 2627)

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

C360S075000

Reexamination Certificate

active

07095575

ABSTRACT:
A self-servo reference signal including a timing pattern and an oblique phase pattern is transferred in advance on a magnetic disk1by magnetic printing. A phase difference detection section13detects a phase difference between the two patterns to detect the position of a magnetic head2. A burst signal generated by a record signal generation section14is recorded in a region of the magnetic disk1where no self-servo reference signal is recorded. A track pitch calculation section11determines a relationship between the reproduction output of the burst signal detected by a reproduction signal processing section12and the phase difference detected by the phase difference detection section13, thus calculating an optimum data track pitch.

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