Method for correcting track counting errors during seeks in a hard disc drive
US5233486A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 6, 1991 |
| Grant date | Aug 3, 1993 |
| Priority date | — |
| Expiry date | Jun 6, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5547
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for correcting track counting errors during seeks of a servo head across the surface of a rotating disc of a hard disc drive. The number of tracks remaining in the seek is maintained in a tracks-to-go counter and the value in the counter is stored along with a plurality of previously stored counter values during each a sequence of equal time intervals. Potential track counting errors are detected by applying a first criterion to the stored counter values and first criterion is selected to yield false error detections for patterns of stored values satisfying a second criterion. For each potential track counting error, the second criterion is applied to the stored counter values and the tracks-to-go counter is incremented a selected number of times for patterns of stored values that do not satisfy the second criterion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.