| 摘要 |
When only one type of a memory having an access rate necessary for high-speed data processing is equipped with a subsystem so as to accommodate the entire amount of storage required for the subsystem, a considerable rise in costs occurs. Therefore, in order to keep the rise in cost to a minimum, high-speed memory of a storage capacity required for the high-speed processing and low-speed memory of a storage capacity that can be safely employed for low-speed processing are both equipped with the disk memory system. With this arrangement, the rise in costs can be kept to a minimum, and access time to the memory can be reduced. The performance of the disk memory system can be thereby improved.
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