Patent ID: 8295138

Claim:
A recording medium provided with a write-once area allowing data to be recorded therein once and comprising a main data area as well as a management/control area for recording management/control information for recording data into said main data area and reproducing data from said main data area wherein: said main data area comprises a regular recording/reproduction area which data is recorded into and reproduced from as well as an alternate area for recording data due to a defect existing in said regular recording/reproduction area or for recording data in a process to renew data; said main data area further comprises a temporary defect list including alternate-address information for writing data into the alternate area, the alternate-address information including status data, the status data having at least first and second status values, the first status value indicating a start physical address of a contiguous range of clusters serving as the alternate area, the second status value indicating an end physical address of the contiguous range of clusters serving as the alternate area.