Patent ID: 6873488
Filing Date: 2005-03-29
Classification: G11B

Abstract:
1. A method of generating a reader-to-writer offset for a head positioned over a track on a disc in a disc drive, wherein a reader and a writer are mounted on the head, the method comprising: determining an inside coarse boundary and an outside coarse boundary of an off-track capability (OTC) of the head by using coarse steps for the reader across the track, wherein the OTC is a portion of a track pitch over which the reader is expected to read information written on the track that is free of an incorrigible bit error; determining an inside fine boundary and an outside fine boundary of the OTC of the head by using fine steps for the reader within a range that is defined by the inside coarse boundary and the outside coarse boundary; and computing a difference between the inside fine boundary and the outside fine boundary to determine the reader-to-writer offset of the head.