Data storage device measuring reader/writer offset by reading spiral track and concentric servo sectors

摘要

A data storage device is disclosed comprising a disk comprising a spiral track, and a head actuated over the disk, wherein the head comprises a read element offset radially from a write element by a reader/writer offset. The spiral track is first read to write a plurality of concentric servo sectors on the disk that define at least one concentric servo track on the disk. The spiral track is second read and the concentric servo sectors are read to measure the reader/writer offset.

主权项

1. A data storage device comprising:
a disk comprising a spiral track; a head actuated over the disk, the head comprising a read element offset radially from a write element by a reader/writer offset; and control circuitry configured to:
first read the spiral track to write a plurality of concentric servo sectors on the disk that define at least one concentric servo track on the disk;generate a first radial location measurement based on reading the spiral track;generate a second radial location measurement based on reading the concentric servo sectors; andmeasure the reader/writer offset based on a difference between the first and second radial location measurements.