Method and system for achieving SAN network data equalized transmission

The invention discloses a method for achieving SAN network data equalized transmission. The method comprises following steps that an A/P type storage Lun is mapped to an array controller A and an array controller B by an A/P array; that the array controller A is connected with a first host HBA card through a first switch; that the array controller B is connected with a second host HBA card through a second switch; that the first switch is connected with the second switch; that a host packages a transmission link with multipath software; that a SAN network performs data equalized transmission with the second switch by using the first switch. The method may sharply decrease faults in each link, reduce single point failure domain, achieve link multiplexing in order that a link originally in a Standby mode is switched to an active mode, bear service data transmission, and increase data throughout. The invention also discloses a system for implementing the method.