Patent ID: 9437232
Filing Date: 2016-09-06
CPC Classification: G11B

Claim Text:
1. A magnetic recording disk drive comprising; a magnetic recording disk comprising at least one read head for reading data from the data tracks and PES blocks from the servo tracks; a write head for writing to the data tracks; a head carrier supporting the read head and write head; an actuator connected to the carrier for moving the read and write heads radially across the disk; read/write electronics coupled to the read head and write head for decoding the PES blocks read by the read head into PES values and for causing data to be written into the data sectors by the write head, the read/write electronics being adapted to cause the write head to write PES values into the data tracks when writing data into the data sectors; and servo electronics coupled to the actuator for adjusting the radial position of the read head in a data track in response to the written PES values (WPES values) read by the read head.