Correcting a track pitch error with a subsequent servo-write pass
US7667920B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2007 |
| Grant date | Feb 23, 2010 |
| Priority date | — |
| Expiry date | Dec 28, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59611
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for correcting a track pitch error in servo tracks written on a magnetic recording media coupled with a disk surface, by using a subsequent servo-write pass, comprises propagating servo tracks across the magnetic recording media in a previous servo-write pass. The servo tracks have radial positioning servo code. The servo tracks enable a magnetic transducer to be positioned to at least one radial position on the magnetic recording media. At least one corrected radial reference point is calculated for the track pitch error written on the magnetic recording media, by identifying at least one inconsistency between a mechanical response of an actuator and the track pitch. A corrected location for at least one servo track is identified. At least one new servo track at the corrected location is propagated with the subsequent servo-write pass. Optimum data track distribution across the disk surface and optimum reading and writing of data to and from the magnetic recording media is enabled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.