Adaptive data recovery procedure based on radial positioning

US7920350B2 · kind B2 · utility

Assignee

• Hitachi Global Storage Technologies Netherlands B.V. · NL

Inventors

• Hoan A. Au · Palo Alto, US
• Theofilos G. Fkiaras · San Jose, US
• David H. Jen · San Jose, US
• Bernd Lamberts · Cupertino, US
• Kris Schouterden · Los Gatos, US
• Douglas Zuercher · معلمی نژاد, US

Key dates

• Filing date: Sep 30, 2008
• Grant date: Apr 5, 2011
• Expiry date: May 19, 2029

Classification

• Technology area (CPC G): Physics
• CPC primary: G11B5/59611
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

Data recovery information characterizes data recovery procedure (DRP) steps to be performed within a hard disk drive (HDD) in response to a miss. Particular data recovery information corresponds to a radial position of the actuator and, therefore, the position of the magnetic recording read/write head relative to the associated storage media at the location at which the miss occurred. The data recovery information is based on the physical shape of a write pole and on how the physical shape of the pole inherently affects operational data error associated with the head. Because of the foregoing characteristics of such data recovery information, a more efficient and performant data recovery procedure is performed based thereon.