I have an old poweredge sever that I want to make into a SAN. However, I don't really now what OS to use. This is only for education/play but I want it to have the best performance possible at the cheapest price as possible, preferrably free and/or open-source. I also know that I can use iSCSI but I would like to know what other alternatives are available. The key goal here is to just become famliar the working of an as close to production class SAN as possible (EMC CX maybe - budget permiting) and run a couple of test clusters on it. Any help or direction is very much appreciated.