| 摘要 |
A recording and reproducing apparatus has a recording control section for multiplex-recording data in one of recording unit regions of a holographic recording medium; a reproducing control section for selectively reproducing the data multiplex-recorded in the recording unit region; a measuring section for causing specific data to be recorded in a recording unit region A to measure a maximum multiplex-recordable number N of the region A; a multiplicity setting section for setting (i) a multiplex-recording number M (M<N) of data to be recorded in the region A and (ii) a multiplex-recording number (N-M) of a buffer region of the region A, by using the maximum multiplex-recordable number N; and a storage section for storing the number N and the number M. When data B is to be recorded in the region A beyond multiplex-recording number M, the recording control section multiplex-records page data B in the buffer region of the region A within the range of the maximum multiplex-recordable number N.
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