Magnetic disk device and determining method of crossing a zone boundary
US9384768B1 · kind B1 · utility
3Cited by
5References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 4, 2015 |
| Grant date | Jul 5, 2016 |
| Priority date | — |
| Expiry date | Mar 4, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/1242
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
According to one embodiment, a magnetic disk device includes a magnetic disk in which servo patterns with different writing frequencies are recorded and divided into a plurality of zones in a cross-track direction; a magnetic head that is provided for the magnetic disk; and a controller to determine whether the magnetic head cross a zone boundary between the zones of the servo patterns, according to a predicted position of the magnetic head that is corrected with reference to a phase shift time between the zones of the servo patterns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.