Repeated runout (RRO) compensation for alternating tracks in an interlaced magnetic recording system
US9508370B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2016 |
| Grant date | Nov 29, 2016 |
| Priority date | — |
| Expiry date | May 26, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59627
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for controlling the position of a control object in a closed loop control system, such as a servo control system used in a data storage device. In some embodiments, spaced apart first and second data tracks are written to a rotatable data recording medium without using repeated runout (RRO) compensation values to correct for RRO error in servo data written to the medium. A third data track is subsequently written so as to be interspersed between and partially overlap the first and second data tracks. The third data track is written using a set of RRO compensation values to correct for the RRO error in the servo data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.