| 摘要 |
PURPOSE:To simultaneously read out data different from each other, which are divided by plural internally stored data numbers, to terminal equipments different from each other in parallel. CONSTITUTION:A management data storage part 9 is provided where storage places of data which are stored in storage devices 8A to 8N and are divided by data numbers are stored and a block record number is stored also in the case of storage of data having plural data numbers in the same storage device, and an input/output processing means 6 compares the data volume of data inputted from an input/output device 2 with a reference value and detects and designates storage devices different from each other to control storage of data in the case of the data volume equal to or larger than the reference value and designates a storage device for common storage to store data in the case of the data volume smaller than the reference value. When a read request comes from a terminal equipment, the input/output processing means 6 refers to the management data storage part 9 to detect the pertinent storage device and designates data read from this storage device.
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