| 摘要 |
A record reproducing device (A) which, when data attempted to be written into a sector constituting a recording area (B2) on an MO disk (B) are found unsuccessful in being written, performs as many retries as are specified, and, when a specified number of retries are not successful in writing data, regards that sector as a defective sector and write data in another sector, wherein the CPU (11), when recovery sectors successful in writing initialization data after retries at physical formatting are available, records for each such recovery sector a required number of retries in medium management information (B1) on the MO disk (B) as retry count information. When actual data are to be written onto the MO disk (B) on which retry count information are recorded after completion of physical formatting and when the CPU (11) fails to write the actual data to detect a defective sector, the CPU determines, as an alternate sector into which data are to be written instead, a sector carrying fewer number of retries than those indicated by retry count information on that defective sector.
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