| 摘要 |
PROBLEM TO BE SOLVED: To suppress deterioration in write performance of a host even when a write order is concentrated from a host to a controller module CM.SOLUTION: A storage device 9 connects a plurality of controller modules CM via a Peripheral Component Interconnect express (PCIe) switch 7. A CM 1 has a PCIe switch 16 that determines a state of a queue 12a in a memory controller 12. When the queue 12a in the memory controller 12 is determined to be in a predetermined state, as one example, the PCIe switch 16 directly outputs a state notification indicating to the effect that the queue 12a is in the predetermined state to a CM 4 connected to a host 8. In a CM 4. In the CM 4, when an order to write data to a disc 5 managed by the CM 1 is received from the host 8, a Central Processing Unit (CPU) 48 determines whether or not the state notification output from the CM 1 is already received, and when it is determined that the state notification output from the CM 1 is already received, saves data on the write order to another CM, and after the data retreat is completed, sends notification of completion of writing to the host 8. |
