Disk drive with self servo writing capability
US6798610B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2000 |
| Grant date | Sep 28, 2004 |
| Priority date | — |
| Expiry date | Apr 24, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/22
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention is directed to utilizing the capabilities of multi-stage actuators in disk drives to do self servo writing on the disk surfaces, thereby avoiding the use of a servo track writer. In one embodiment, a crash stop that limits the range of motion of a primary actuator is used as an initial reference point for a secondary actuator associated with a first head to position the first head to write a first servo track on a first disk surface. The first servo track is subsequently used as a reference point for a secondary actuator associated with a second head to position the second head for writing one or more servo tracks on a second disk surface. One of these servo tracks on the second disk surface is then used as the reference point relative to which the primary and/or secondary actuator associated with the first head moves the first head to write one or more servo tracks on the first disk surface. This process of alternatingly using the servo tracks written by one head as the reference point relative to which the primary and/or secondary actuators move the other head to write further servo tracks is repeated until all of the desired servo tracks are written.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.