| 摘要 |
PROBLEM TO BE SOLVED: To prevent the performance of access to an area of high priority from decreasing owing to access to other areas by setting as reference values by the areas of a disk one of an access processing frequency, an access data amount, and an access time and accessing the respective areas according to the reference values. SOLUTION: In addition to a setting means which sets reference values for the access frequencies, access data amounts, etc., of the areas A and B of the disk according to access priority, a disk control part 4 is provided with a disk access control means 4a which adjusts the access frequencies and access amounts by the areas A and B according to the set values of the areas A and B set by the setting means. The two areas A and B of the disk 3 are given priority. Namely, data of high priority are recorded in the area A and data of relatively low priority are recorded in the area B. According to the priority, a reference value for an access ratio is set in advance and a queue processing by access is performed according to the reference value.
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