Method and apparatus for inspecting recording medium for defects
US6304986A · kind A · utility
20Cited by
3References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 1999 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Mar 12, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for detecting defects on a surface of a recording medium in a magnetic disk apparatus. An idling state of the magnetic disk apparatus is detected and a determination is made of the duration that the recording medium has been in use. The presence/absence of defects on the surface of the recording medium is then sequentially detected, responsive to the duration and the idling state, beginning at a start location of the recording medium. Data located at a detected defect is reallocated to a predetermined storage area, and the detected defect is mapped in a defect location map.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.