| 摘要 |
PROBLEM TO BE SOLVED: To provide a disk device for suppressing the increase of a use RAM region and the frequency of a reading operation from the disk medium of a necessary module, and for executing a command without rotating a spindle motor(SPM) according to the type of a command in response to a request from a host system. SOLUTION: This disk device is provided with a CPU, a CPU bus, a RAM, a flash ROM and a disk medium, and when a program module corresponding to execution contents of a program does not exist in the RAM, and the program module exists in the flash ROM, the program module is read from the flash ROM, and when any program module does not exist, it is read from the disk medium, and developed to the RAM. Then, this disk device is configured by a means which calculates the priority order of the existence of the program module in the flash ROM based on its use frequency to successively replace the program module whose priority order is lower among program modules stored in the flash ROM by the program module whose priority order is higher. COPYRIGHT: (C)2005,JPO&NCIPI
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