Port configuration method, port configuration component and hard disk expansion device

The invention discloses a port configuration method, a port configuration component and a hard disk expansion device in the technical field of computers. The backboard controller in the application can control the expansion chip to be powered off and then powered on when the port configuration topology type corresponding to the port configuration instruction is stored in the memory; and after the extended chip is electrified, transmitting a target signal corresponding to the port configuration topology type to the extended chip, so that the extended chip reads a port configuration firmware mirror image corresponding to the target signal from the memory, and configures each port of the extended chip based on the port configuration firmware mirror image. According to the scheme, the port configuration efficiency of the extended chip is improved, and the hardware production cost and maintenance cost can be reduced. Correspondingly, the invention provides a port configuration assembly and a hard disk expansion de