| 摘要 |
PURPOSE:To reduce a time to be used for a partial write access and to improve the throughput of a system by overlapping plural partial write accesses against the same memory block. CONSTITUTION:A prescribed time is required until the read of the original data of a storage part 21 after a partial access request to a main storage device 10. In the case of the plural times of the partial write accesses to the same memory block 19 within this time, the partial write data of them are merged before the write to the storage part 21, compressing them to one. In a time of the actual data setting to the storage part 21 by a preceding partial write access, the write of the following partial write access is performed. As for the address of the partial write access within the same memory block 19, for example, a busy control is performed so that only the request of the partial write access having the same address in a main storage controller is issued. |
