Method of managing defective sectors in a disk-shaped information
recording medium and an apparatus for performing the same
    17.
    发明授权
    Method of managing defective sectors in a disk-shaped information recording medium and an apparatus for performing the same 失效
    在形状良好的信息记录介质中管理缺陷部分的方法及其执行装置

    公开(公告)号:US5111444A

    公开(公告)日:1992-05-05

    申请号:US379462

    申请日:1989-07-13

    IPC分类号: G06F3/06 G11B20/10 G11B20/18

    摘要: 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.

    Information recording and reproducing apparatus with management of
defective sector
    20.
    发明授权
    Information recording and reproducing apparatus with management of defective sector 失效
    具有缺陷扇区管理的信息记录和再现装置

    公开(公告)号:US4885735A

    公开(公告)日:1989-12-05

    申请号:US76170

    申请日:1987-06-22

    CPC分类号: G11B20/1883 G11B2220/20

    摘要: An information recording and reproducing apparatus for recording and reproducing information on and from a disk type information recording medium, wherein the information recording medium is used in which normal sectors (s1, Sn) each having an address formatted on an address area 12 in a sector ID field 9 and an alternative sector R1 having an address not yet recorded thereon are included on a same track. When a defective sector S3 is detected, first, the address of the defective sector is disabled to be reproduced by recording a delete signal 109 on the address area 12 of the defective sector S3, and at the same time, the address of the defective sector is recorded on an address area 13 in the unused alternative sector R1 located on the same track as the defective sector S3, and then, the data to be recorded on the defective sector is recorded within the alternative sector R1. Owing to such an operation for using an alternative sector, the alternative sector having the same address and data as the defective sector is formed on the same track as the defective sector. As a result, an information recording and reproducing apparatus which enables to access the alternative sector without an additional seek operation at the time of reproduction is provided.