| 摘要 |
According to one embodiment, a magnetic disk apparatus comprises a storage-medium unit including a storage medium, a magnetic-disk medium unit including a magnetic disk medium, a storing unit configured to store data transmitted from a host system in the storage medium, a first comparator configured to compare an input password with a password stored in the storage medium or in a semiconductor memory provided on a substrate on which the storage medium is provided, and a control unit provided in the storage-medium unit and configured to control an access to the magnetic disk medium in accordance with a comparison result obtained by the first comparator.
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