Patent Number: 6,169,710

Title: Optical disc recording/reproducing method and apparatus

Abstract: The present invention provides a data recording/reproducing method not lowering the throughput while performing a defect processing. According to this method, a read error is monitored when a data is read out from an address X of the optical disc by an optical head block. If a read error is caused, the optical head block is made to retry the read out from the address X and a retry count is recorded in the memory each time retry is performed. When the read out from the address X is successful, the retry count stored in the memory is read out so as to be compared to a predetermined value. If the retry count exceeds the predetermined value, an alternative address Y is allocated on the optical disc to replace the address X and the data which has been read out from the address X is copied in the address Y, and the DMA (defect management area) of the optical disc is rewritten so that the data is read out from the address Y when an instruction to read out the address X is issued from an upper node apparatus.

Inventors: Arai; Toru (Tokyo, JP)

Assignee: NEC Corporation

International Classification: G11B 20/18 (20060101); G11B 7/0045 (20060101); G11B 7/0037 (20060101); G11B 7/00 (20060101); G11B 017/22 ()

Expiration Date: 01/02/2018