Magnetic disk having an index area and a limited number of radially extending servo sections
US4964009A · kind A · utility
15Cited by
0References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1989 |
| Grant date | Oct 16, 1990 |
| Priority date | — |
| Expiry date | Nov 14, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic disk, which is used for recording and reproducing data with a read/write head. The magnetic disk has an index area with an index signal recorded therein and a plurality of servo sectors formed between a plurality of data areas subsequent to the index area. Each servo sector has a servo information area, in which a servo information pattern adapted for positioning the read/write head is formed, and first and second gap sections provided on the both sides of the servo information area for absorbing rotational variations of the disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.