Disk recording device for writing a radially coherent reference band by measuring relative timing offsets of reference bursts
US8988809B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 18, 2014 |
| Grant date | Mar 24, 2015 |
| Priority date | — |
| Expiry date | Feb 18, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59666
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk recording device is disclosed comprising a disk and a head. A first plurality of reference bursts are written along a first radius of the disk, the first plurality of reference bursts comprising a first reference burst. A second plurality of reference bursts are written along a second radius of the disk circumferentially offset from the first radius, the second plurality of reference bursts comprising a second reference burst. A first segment of a reference band is written along a third radius of the disk circumferentially offset from the second radius, and at a first timing offset from the first reference burst. A second timing offset between the first reference burst and the second reference burst is measured, and a second segment of the reference band is written radially coherent with the first segment based on the first timing offset and the second timing offset.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.