System and method for minimizing write-over encroachment in a disk due to radial sinusoidal runout at the fundamental frequency

摘要

A system and method for intentionally servowriting tracks having 1F runout on a data storage disk using a servowriter. The center of the servowriter hub is misaligned a predetermined distance with respect to the center of rotation of the servowriter spindle motor. The data storage disk is mounted on the spindle hub and tracks are servowritten on the disk surface. The tracks are misaligned with respect to the center of the servowriter hub to form 1F runout having a 1F peak amplitude and 2F runout having a 2F peak amplitude. The 1F peak amplitude is substantially equal to the predetermined distance, and the ratio of the 1F peak amplitude to 2F peak amplitude is at least about four.