Patent ID: 7583470

Claim:
A disk drive comprising: a disk comprising a plurality of tracks, wherein each track comprises a plurality of servo sectors comprising repeatable runout (RRO); a head comprising a read element offset from a write element by a reader/writer offset; and control circuitry operable to: position the read element over a first track and the write element over a second track; generate a first servo control signal for servoing the head in response to the servo sectors in the first track; and write first wedge RRO data to the second track along a substantially sinusoidal path corresponding to the reader/writer offset, wherein the first wedge RRO data are for writing data to a third track, wherein: the control circuitry is further operable to generate the first servo control signal for servoing the head by generating first jog adjustment values to cause the write element to travel in the substantially sinusoidal path; the control circuitry generates the first jog adjustment values in response to NF RRO values and the reader/writer offset; and the NF RRO values represent at least one of a fundamental frequency and a harmonic frequency of the RRO.