Method and apparatus for determining embedded runout correction values
US7054096B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 2003 |
| Grant date | May 30, 2006 |
| Priority date | — |
| Expiry date | Jan 9, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59666
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for compensating for non-linearities due to pivot bearing friction when determining embedded runout correction values during partial self-servo write of a disk drive is disclosed. In one embodiment, the disk drive includes a disk surface having a track written thereon and the track has some written-in runout. The written-in runout that is associated with high-frequencies is determined using a first technique. The written-in runout for the track that is associated with low frequencies is determined using a second technique. Results from the two techniques are combined in order to determine embedded runout correction values for the track when partial self-servo writing, in order to reduce error propagation when writing additional tracks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.