Patent ID: 7405899
Filing Date: 2008-07-29
Classification: G11B

Abstract:
1. A method operable to determine read/write (RW) head radial position relative to a track within a magnetic disk, comprising: sensing a S-burst signal and a P-burst signal with the RW head, the S-burst signal and the P-burst signal associated with a servo pattern on the magnetic disk, the servo pattern including a S-burst pattern on each half track of each track of the magnetic disk, in which all S-burst patterns disposed radially across the magnetic disk have a same phase relationship, and the servo pattern also including a P-burst pattern on each half track of each track of the magnetic disk following a corresponding S-burst pattern for each half track, in which P-burst patterns across two adjacent tracks have different phase relationship among the P-burst patterns across the two adjacent tracks in relation to a phase of the S-burst pattern; determining a phase difference between the S-burst signal obtained from sensing at least one of the S-burst patterns and the P-burst signal obtained from sensing at least one of the P-burst patterns; and determining the RW head radial position based on the phase difference between the S-burst signal and the P-burst signal.