Magneto-optic recording/erasing system with simultaneous dual head control and disk error detection
US4926408A · kind A · utility
11Cited by
1References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1989 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | Apr 14, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magneto-optic recording/erasing system uses two heads, one for writing formatted information into sectors along a track of a magneto-optical disk and a second head working simultaneously with the first head to read formatted information and detect defects. The system also writes information during formatting to indicate damaged disk track sectors and eliminate reference to them during formatting to produce a more reliable disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.