Patent ID: 7688539
Filing Date: 2010-03-30
Classification: G11B

Abstract:
1. A disk drive comprising: a disk; a head actuated over the disk; and control circuitry operable to: (a) position the head at a radial location over the disk; (b) write a servo burst at the current radial location; (c) read the servo burst to generate a read signal; (d) process the read signal to generate a position error signal (PES); (e) move the head radially in response to the PES; and (f) repeat (b) through (e) multiple times to form a spiral track spanning at least one revolution of the disk in a circumferential direction, and scanning a substantial part of the disk in a radial direction; wherein: the head comprises a read element radially offset from the write element; and the control circuitry is further operable to write a seed track to the disk by: the head is positioned at the radial location over the disk in step (a) in response to the seed track.