Heat-assisted magnetic recording device capable of laser calibration during a background operation
US9865296B1 · kind B1 · utility
1Cited by
11References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2016 |
| Grant date | Jan 9, 2018 |
| Priority date | — |
| Expiry date | Sep 13, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A storage device performs a background operation involving seeking a read/write head between inner and outer diameters of a disk of the storage device. During the seeking, adjacent test tracks are written at a diameter between the inner and outer diameters of the disk. The adjacent test tracks are written using varying levels of laser power applied to the disk via the read/write head. An optimum value of the laser power is determined based on reading at least one of the adjacent test tracks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.