Patent ID: 8077422

Claim:
A method comprising: writing a first spiral set starting at a first track; determining a radial offset; determining a second track based on the radial offset; writing a second spiral set starting at the second track; determining a spiral set-to-wedge ratio based on a number of spiral sets to be written; and writing servo information using the first spiral set and the second spiral set, the servo information including one or more sets of servo wedges; where writing the one or more sets of servo wedges is based on the spiral set-to-wedge ratio; and where the radial offset corresponds to a radial distance measured along a radial line of a circular storage disk having an inner diameter and an outer diameter corresponding respectively to inner-most and outer-most radial locations at which concentric tracks are written to the circular storage disk, and determining a second track comprises determining the second track with respect to the first track to effect a predefined circumferential position of the second spiral set relative to the first spiral set after writing the first and second spiral sets to the circular storage disk.