Patent ID: 6847502

Claim:
In a rotating media storage device (RMSD), the RMSD having a disk including at least one track having a plurality of servo wedges, a moveable head, a servo control loop for controlling the position of the moveable head to perform track following, a method for repeatable runout (RRO) determination, the method comprising the steps of: a. track following on the plurality of servo wedges of the track to obtain a plurality of position error signal (PES) values; b. summing the PES values for a plurality of different sets of servo wedges of the track to generate a plurality of shifted summed position error signal (SSPES) values; and c. shifting the plurality of SSPES values for the track by a phase shift value to generate a plurality of corrected shifted summed position error signal (CSSPES) values corresponding to the repeatable runout.