Patent ID: 6061200
Filing Date: 2000-05-09
Classification: G11B

Abstract:
A method for creating servo repeatable runout (RRO) burst correction values for a hard disk drive, the method comprising the steps of:developing a representative kernel for hard disk drives of a first type, the hard disk drive being of the first type, the representative kernel including a representation of the dynamic characteristics of the hard disk drive, and functionality for extraction of written-in errors to determine burst correction values for at least one servo sector, the hard disk drive having a head positioner servo system for positioning a data transducer head relative to the data track defined on a storage disk rotating at a predetermined rotational speed;servoing the data transducer head upon the data track with the head positioner servo system by steps including:reading, with the data transducer head, the servo sector fine position bursts, the servo sector fine position bursts including true positions and written-in errors; andmeasuring a position for each servo sector to obtain a measured position value the measured position value including the written-in errors and a true position; andextracting within the disk drive the written-in errors from the measured position value for each servo sector with the representative kernel to provide an RRO correction value for each servo sector, the extracting including separating the written-in errors from the true position.