05111444 is referenced by 251 patents and cites 4 patents.

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.

Title
Method of managing defective sectors in a disk-shaped information recording medium and an apparatus for performing the same
Application Number
7/379462
Publication Number
5111444
Application Date
July 13, 1989
Publication Date
May 5, 1992
Inventor
Isao Satoh
Neyagawa
JP
Yoshihisa Fukushima
Osaka
JP
Agent
Panitch Schwarze Jacobs & Nadel
Assignee
Matsushita Electric Industrial
JP
IPC
G11B 3/90
View Original Source