| 摘要 |
<p>A disk cartridge, wherein a plurality of erroneous erasing prevention holes (41, 42) are opened in a case (4), an erroneous erasing prevention block (5) capable of opening and closing these erroneous erasing prevention holes (41, 42) is stored in the case so that it can be operated to move and softly locked at a plurality of positions, and the erroneous erasing prevention block (5) is moved to each softly locked position to change the combination of the opening and closing conditions of the erroneous erasing prevention holes (41, 42) in order to set a plurality of erroneous erasing prevention modes of three or more, whereby the possibility of erroneously erasing important data can be eliminated.</p> |
