Magnetic disk apparatus and servo signal recording method
US7116509B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 2003 |
| Grant date | Oct 3, 2006 |
| Priority date | — |
| Expiry date | Aug 22, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/09
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic disk apparatus capable of generating a reference clock signal without using an external reference by writing a clock track only once using a head of the magnetic disk apparatus even if the head is of a read/write element separation type. Using the head of the magnetic disk apparatus, a clock track is recorded only once and the recorded clock track is played back to measure the total number of clock bits in one revolution. A time interval between servo sectors is determined by dividing the total number of clock bits thus measured by the number of servo sectors. By using as a timing reference the clock bits produced by playing back the clock track, the servo sectors are recorded in such a manner that they are located at the determined interval.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.