Patent ID: 7602575
Filing Date: 2009-10-13
Classification: G11B

Abstract:
1. A disk drive comprising: a disk; a head actuated over the disk, the head comprising a read element offset radially from a write element forming a reader/writer offset; and control circuitry operable to self servo write the disk by: (a) initializing an estimated reader/writer offset; (b) reading servo bursts in a first servo track; (c) moving the head radially using the estimated reader/writer offset; (d) writing propagated servo bursts to a target servo track; (e) reading the propagated servo bursts from the target servo track to generate a read signal; (f) processing the read signal to generate a burst crossing signal (BCS); (g) adjusting the estimated reader/writer offset in response to the BCS; and (h) repeating (c) through (g) at least once.