Zone servo write with multi-frequency self-spiral write
US8687308B1 · kind B1 · utility
8Cited by
18References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 1, 2011 |
| Grant date | Apr 1, 2014 |
| Priority date | — |
| Expiry date | Jun 15, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59666
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In one aspect, systems, apparatuses and techniques obtain, through read circuitry, timing information for a machine-readable medium to determine head position; and write, by write circuitry, a first set of spiral servo reference tracks at a first frequency on a first zone of the medium and a second set of spiral servo reference tracks at a second, different frequency on a second zone of the medium. The second zone may be different from the first zone. Further, at least one of the first and second sets of spiral servo reference tracks may be written to the medium based on at least the timing information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.