According to the FAQ http://www.clusterfs.com/faq.html#io-2 a single cpu Opteron box has seen 550MB/s. Are there any other details on this box? Chipset/motherboard etc. Stu. -- <---------------------------------------------------------------------> Dr Stuart Midgley | stuart.midgley@anu.edu.au Supercomputer Facility | sdm900@gmail.com Leonard Huxley Building 56 | +61 (0)2 6125 5988 Work Australian National University | +61 (0)2 6125 8199 Fax CANBERRA ACT 0200 | +61 (0)4 1125 2488 Mob