Patent ID: 7116513
Filing Date: 2006-10-03
Classification: G11B

Abstract:
1. A method of controlling positioning of a transducer that is adjacent to a rotatable disk in a disk drive, the method comprising: determining a vibration state of the transducer relative to the disk; and controlling positioning of the transducer to maintain the transducer on a track on the disk based on a compensation scheme that varies based on the determined vibration state of the transducer, wherein the controlling positioning of the transducer includes selecting among output of two or more compensators, based on the determined vibration state of the transducer, to control positioning of the transducer, and wherein one of the compensators is configured to improve transducer track following while the transducer is subjected to vibration, and another one of the compensators is configured to improve throughput of data read from and/or written to the disk.