Method and apparatus for written-in tracking error composition for linear tape drives
US6943979B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2003 |
| Grant date | Sep 13, 2005 |
| Priority date | — |
| Expiry date | Mar 14, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/584
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An arrangement and method for compensating for the written-in tracking error for a linear tape drive filters out spatial error components of a position error signal (PES). The position information contained within A, B pairs of servo stripes, and within C, D pairs of stripes is preserved. The timing between the A and C bursts and the C and A bursts is filtered, such as by low pass filtering, to filter out the error that can be written-in by a servo writer. The timing signal for the A, B bursts and C, D bursts are divided by the filtered timing signals for the AC and CA timing signals, respectively. This ratio provides the filtered PES signal used by a head positioner to precisely position the head with respect to the tape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.