In this paper, we've designed and implemented two memory copy Reduction schemes in Linux kemel, direct I/O and one-copy. The direct I/O path skips the buffer cache layer of Linux kemel and directly copies the disk blocks to the user buffer. And, the one-copy provides fast disk-to-network data path without copying to user address space. These enhancements should increase the throughputs of the MOD servers. The experimental results demonstrate throughout improvements and show considerable reduction of CPU overhead.