Measurement of tape position error
US6430008B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2000 |
| Grant date | Aug 6, 2002 |
| Priority date | — |
| Expiry date | Mar 30, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/584
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Positioning of a tape head relative to a magnetic tape may be improved through accurate measuring of magnetic tape position error. The tape head includes at least one read module having two servo read elements. A head control detects the presence of corresponding synchronization fields passing the servo read elements. The elapsed time between the detected synchronization fields is determined. Tape skew is calculated based on the elapsed time. Tape position error calculation may be further improved by including another servo read element on either a second read module or a write module. Tracking information read from two servo read elements scanning the same servo stripe is used to calculate the offset between a read module and the write module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.