Patent ID: 8085489
Filing Date: 2011-12-27
Classification: G11B

Abstract:
1. A method for writing servo patterns onto a disk of a disk drive, said method comprising: providing a plurality of different drive currents for an actuator while pushing said actuator into a crash stop defining a swing range of said actuator; performing a write operation for at least one of said plurality of different drive currents with a write element to write a plurality of servo pattern tracks including a plurality of separate servo pattern sectors, wherein adjacent tracks in said plurality of servo pattern tracks are separated in a radial direction; writing an identifier in at least one of said plurality of servo pattern tracks, said identifier indicating that said servo pattern track is newly written in an on-going write process; changing gradually a drive current of said plurality of different drive currents while pushing said actuator into said crash stop so as to gradually move a read element in searching for a servo pattern track to a radial position different from a radial position of said write element; and positioning said read element at one of said plurality of servo pattern tracks.