Data storage device defining track trajectory to reduce AC track squeeze
US10699745B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2019 |
| Grant date | Jun 30, 2020 |
| Priority date | — |
| Expiry date | Jun 28, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1816
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data storage device is disclosed comprising a head actuated over a disk comprising servo data for defining a plurality of data tracks, wherein each data track comprises a plurality of data segments. First data is written to a first data segment of a first data track, and second data is written to a second data segment of a second data track. After writing the second data, a quality metric is measured for at least two off-track offsets of the first data segment. A track pitch is estimated between the first data segment and the second data segment based on the quality metrics, and a track trajectory is generated for the second data segment based on the estimated track pitch. Third data is written to the second data segment based on the track trajectory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.