Method and disk drive for shock estimation and write termination control
US6714371B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 31, 2001 |
| Grant date | Mar 30, 2004 |
| Priority date | — |
| Expiry date | May 8, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to a technique for shock estimation and write termination control in a disk drive. During a data write operation, a selected track's embedded servo sectors are read to generate position error signal values. A write unsafe limit is provided for terminating a data write operation if at least one position error signal value exceeds the write unsafe limit. A shock event limit is provided, and if a current position error signal value is less than the write unsafe limit value, then a function value is calculated based on the current position error signal value and a previous position error signal value. If the calculated function value exceeds the shock event limit, a data write operation is terminated. Otherwise, the operation is continued.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.