An I/O acceleration method for network computing, which is an iSCSI transparent reliable multicast (iTRM) protocol is presented. The network data loading performace of the iSCSI network computing system is improved by introducing a dual I/O path: the multicast path transmitting shared data and the iSCSI path transmitting iSCSI PDU. And in the iSCSI initiator side of the multicast,data packet loss detection and retransmission requests are performed from the iSCSI session retransmission of the lost data packets to ensure the I / O data reliability.The iSCSI protocol is extended to support the multicast session announcement. A transparent agent to monitor the loading of storage servers and decide when to launch the multicast session is designed based on data apperceiving. The test results show that the iTRM protocol boosts the performance of parallel I/O operations for multiple hosts.