Method of determining correctness and contents of control data structures in moving media data storage systems
US5166935A · kind A · utility
7Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 28, 1990 |
| Grant date | Nov 24, 1992 |
| Priority date | — |
| Expiry date | Sep 28, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical disk has four copies or sets of its control data structures. The control data structure includes a disk definition structure DDS, a primary defect list PDL, and a secondary defect list SDL. Procedures are described for checking to whether or not all copies of the data structures have congruence. If not, all the tables are then made congruent and re-recorded on a disk. In the procedure, the copy having the greatest number of entries is first examined for determining whether or not congruence is possible. If congruence is not possible from the longest copy, then the next longest copy is used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.