Personally, this is the route I've taken using a disk shelf. An array of 8x HGST HE8 6TB SAS3 drives reads/writes surprisingly fast (at least I was extremely impressed)...The more I'm thinking the more I like this idea... because I can add an adapter to existing servers and get storage for those too all on the storage host. Nothing I've done before, so I'm a newb at it but I like the idea of this.