An illustrative embodiment provides a computer-implemented method for target routing by initiator, using Internet small computer system interface. The computer-implemented method obtains a logical unit number configuration, containing a set of logical unit numbers, determines whether an initiator Internet protocol address, associated with a requester, has a mapping to a logical unit number in the set of logical unit numbers. The computer implemented method further sets a path for an input output/request from the requester to a backing file, according to the mapping, and returns success to the requester.