Method and apparatus for high fly write detection using stored amplitude values
US6987628B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 2001 |
| Grant date | Jan 17, 2006 |
| Priority date | — |
| Expiry date | Jan 7, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for detecting a high flying condition of a transducer head in a computer disk drive is provided. The method and apparatus allow the detection of high fly write events that occur over one or a small number of data sectors. In addition, the present invention provides a method and apparatus for detecting high fly write events with a great deal of sensitivity. The method and apparatus of the present invention provide quick response and high sensitivity by monitoring the strength of a signal derived from data written to the disk, and signaling a high fly write event if the monitored signal strength in connection with a particular piece of data is less than a stored high fly write number corresponding to that piece of data by a predetermined amount.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.