| 摘要 |
A disk drive capable of setting a hidden area in which the access thereto is limited, on a disk is disclosed. The disk drive sets a predetermined storage area on the disk as a hidden area in accordance with a setting command from a host system. In accordance with this setting processing, the disk drive informs the host system of a capacity of a normal storage area comprising all storage areas on the disk except for the hidden area. Further, the disk drive cancels the hidden area on the disk and changes it to the normal storage area in accordance with a canceling command from the host system. In accordance with this canceling command, the disk drive erases the data, which is recorded in the hidden area on the disk.
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