Method of managing defective sectors in a disk-shaped informatio

Details Method of managing defective sectors in a disk-shaped informatio Method of managing defective sectors in a disk-shaped informatio

1989-07-13

1992-05-05

Envall, Jr., Roy N.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 32, 369 54, 369 59, G11B 390

Patent

active

051114445

ABSTRACT:
A method of and an apparatus for managing defective sectors in an information recording medium such as a write-once optical disk and rewritable optical disk in which many defective sectors may be generated and unevenly distributed. In the medium, primary alternative zones are formed which are composed of: a prime area for recording user data the capacity of which is variable according to the volume capacity and partition capacity and the occurrence rate of defective sectors; a primary spare area for recording alternative sectors; and a primary defect list area for recording a primary defect list. Many defective sectors are managed in the units of alternative zones. When defective sectors cannot be substituted in an alternative zone (e.g., when defective sectors are locally concentrated), defective sectors are managed hierarchically using a secondary alternative zone, thereby reducing the amount of information to be handled for the management of defective sectors. Therefore, the size of the apparatus can be reduced, and defective sectors can be rapidly searched.

REFERENCES:
patent: 4791623 (1988-12-01), Deiotte
patent: 4811124 (1989-03-01), Dujari et al.
patent: 4814903 (1989-03-01), Kulakowski et al.

Affiliated with

Also associated with

Rating

Method of managing defective sectors in a disk-shaped informatio does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of managing defective sectors in a disk-shaped informatio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of managing defective sectors in a disk-shaped informatio will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1418606