| 摘要 |
It is an object of the invention to provide a disk cartridge (20) having a substantially identical form to that of a disk cartridge that accommodates a disk-shaped recording medium (21) having a first recording capacity and accommodating a disk-shaped recording medium having a second recording capacity, which is higher than the first recording capacity, wherein the disk cartridge (20) includes a write protect mechanism, which is different from a write protect mechanism (32) for the disk cartridge accommodating the disk-shaped recording medium having the first recording capacity.
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