Method and apparatus to compensate for servo wedge rotational offset after a head switch
US6067206A · kind A · utility
162Cited by
3References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1997 |
| Grant date | May 23, 2000 |
| Priority date | — |
| Expiry date | Nov 18, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59655
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive controller having a microprocessor and a sampled signal head positioning system measures and stores the relative rotational offsets between heads arranged in a stacked relationship and respective servo wedges on different disk surfaces. The offsets are stored in a table and subsequently applied to a servo wedge detection circuit to ensure that a next sequential wedge is detected after a head switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.