Patent ID: 7298574

Claim:
A method of servo writing a disk of a disk drive, the disk drive comprising the disk and a head actuated over the disk, the head comprising a read element and a write element, the method comprising: positioning the read element over a first track on the disk and the write element over a second track on the disk; synchronizing a phase locked loop (PLL) to first sectors previously written on the first track; writing second sectors to the second track using the PLL, and saving a plurality of phase errors corresponding to the second sectors; computing a correction value corresponding to a selected one of the second sectors, wherein the correction value is computed in response to a plurality of the phase errors generated for a plurality of the second sectors leading the selected sector; positioning the read element over the second track on the disk and the write element over a third track on the disk; synchronizing the PLL to the second sectors using the correction value; and writing a third sector to the third track using the PLL, and saving a phase error corresponding to the third sector.