Method of determining correctness and contents of control data s

Details Method of determining correctness and contents of control data s Method of determining correctness and contents of control data s

1990-09-28

1992-11-24

Canney, Vincent P.

Excavating

371 671, G11C 2900, G06F 702

Patent

active

051669358

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.

REFERENCES:
patent: 4656532 (1987-04-01), Greenberg et al.
patent: 4750106 (1988-06-01), Aiken, Jr.
patent: 4814903 (1989-03-01), Kulakowski et al.
patent: 4862295 (1989-08-01), Tanaka et al.
patent: 5005165 (1991-04-01), Yamanaka et al.

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