| 摘要 |
<p>The present invention is intended to extend the operation life of a recording medium and to assure the safety of data writing to UDA. A recording medium includes a user data area (UDA) for writing real data and a program memory area (PMA) for writing management data. In PMA, repetitive writing operation number NA of UDA, write end address AE, operation life number NL and final address AL, etc. are written. On the occasion of recording the real data to UDA, writing is started from the address next to the write end address AE at the time of the preceding recording operation and after the recording is executed up to the final address AL, data writing is started again from the address 0 to give increment of one (1) to NA. The real data is written in average up to the final address from the start address of UDA. When NA exceeds NL, warning is displayed and the disc ejected. Writing of real data to UDA in which safety of writing is not assured can be avoided.</p> |
