Method for storage of self-servowriting timing information
US6735031B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2001 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | Feb 2, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/012
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for writing timing marks on a rotatable storage medium, such as on a disk in a disk drive, includes the steps of: 1) during a rotation of the disk, detecting the passage of at least a portion of a first timing mark located at a first radius of the disk, and 2) writing a second timing mark at a second radius of the disk, the location of the second timing mark being based at least in part on a stored calculation of a delay from the time of passage of the first timing mark during a rotation of the rotatable storage medium. The location of the second timing mark is calculated based on alternative time intervals between detected timing marks and on various functions of the time intervals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.