Magnetic disk apparatus and its servo signal recording method
US6906884B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2002 |
| Grant date | Jun 14, 2005 |
| Priority date | — |
| Expiry date | Mar 19, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59633
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic disk apparatus includes an actuator for moving a head to a position above the magnetic disk in a servo track movement operation, a range limiter for limiting a movable range of the actuator, a range specifier for setting a specific range of the actuator in the movable range of the actuator, and a control unit. The control unit enables writing a servo signal into the specific range at servo track movement pitch based on servo tracks recorded with the servo signal, correcting the servo track movement pitch on the basis of the number of servo tracks in the specific range and executing control to write the servo signal at corrected servo track movement pitch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.