Systems and methods for improving accuracy of test measurements involving aggressor tracks written to disks of hard disk drives
US9093122B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2013 |
| Grant date | Jul 28, 2015 |
| Priority date | — |
| Expiry date | Jun 24, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2516
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods for improving the accuracy of test measurements involving aggressor tracks written to the disks are provided. One such method involves erasing a circumferential band of a disk, writing a central track on the circumferential band, measuring and storing a first track profile of the central track, writing an aggressor track on each side of the central track at a preselected aggressor track offset from the central track, measuring and storing a track profile of the aggressor tracks at the preselected aggressor track offset, measuring and storing a second track profile of the central track, performing the prior actions exactly n times where n is greater than or equal to 1, determining an estimated distance between the aggressor tracks based on the respective track profiles, determining a selected measurement using the estimated distance between the aggressor tracks, and the first and second track profiles of the central track.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.