公开(公告)号：JPH10301721A

公开(公告)日：1998-11-13

申请号：JP11151497

申请日：1997-04-28

Applicant: IBM

Inventor： ANDO HARUO ,  AIDA SUSUMU

IPC: G06F12/16 ,  G06F3/06 ,  G11B20/18

Abstract: PROBLEM TO BE SOLVED: To re-arrange the data of a defective sector caused in a storage medium of an information recording and reproducing device without losing the original data. SOLUTION: When any defect is generated in the sector of a user area 22, the data are saved to a substitute area 23, and when the defective sector is address-designated by a present LBA, the data of the substitute area 23 are read. A new LBA in which the defective sector is skipped is assigned to each sector of the user area 22. The data of the substitute area 23 are saved in an operating area for this execution. Then, X pieces of data are read from the rear part of the user area 22 according to the present LBA, and written according to the new LBA. The number of addresses is reduced only by the defective sectors in the new LBA than the present LBA for the same sectors so that the original data can be prevented from being lost at the time of writing. In the same way, the re-arrangement of data is repeated only for the X pieces of data.