FIELD: technology for computer distributed data storage systems.
SUBSTANCE: method comprises: receiving a write request by a target controller, where the write request contains data to be written and the target controller belongs to the first control device; recording, by the target controller, data to be written into a storage device of the target controller; and recording, by the target controller, data to be written into the storage devices of the mirror controllers relative to the target controller, wherein the at least one mirror controller belongs to the second control device. According to this technical solution, the data to be recorded can be recorded and stored in several control devices. When any control device fails, the host computer can still access another control device to ensure continuity of service.
EFFECT: increasing the reliability of data storage in the storage system by reducing processing, duplication and load balancing between controllers.
13 cl, 10 dwg
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