Method and apparatus for head positioning control in a disk drive
US7489468B2 · kind B2 · utility
5Cited by
17References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2006 |
| Grant date | Feb 10, 2009 |
| Priority date | — |
| Expiry date | Jun 1, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/042
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
According to one embodiment, a disk drive is provided which corrects already existing offset information according to a variation of a disk runout amount caused by an occurrence of a disk shift. The disk drive effects a head position adjustment at a head positioning control time with the use of offset information stored in a memory. A CPU measures a variation in the disk runout amount and phase caused by an occurrence of a disk shift resulting from an external shock involved and updates the existing offset information with a correction offset information based on a result of measurement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.