Patent ID: 7167940

Claim:
A data processing method for communications performed between two nodes by a plurality of logical communication units, wherein: in the plurality of logical communication units, a first logical communication unit is used in data communication from an initiator to a target via a first communication channel, and a second logical communication unit is used in data communication from a target to an initiator via a second communication channel different from the first communication channel; the first logical communication unit communicates a first data block between the initiator and the target, wherein the first data block makes the target read data from a storage area of the initiator in accordance with the first data block; the second logical communication unit communicates a second data block between the initiator and the target, wherein the second data block makes the target write data into a storage area of the initiator in accordance with the second data block; and the target reads control data for a predetermined operation to be performed by the target from the storage area of the initiator in accordance with the first data block and the second logical communication unit communicates a third data block including a command for the predetermined operation.