Has any one tried this alternative to windows home server - Unraid by Lime Tech? http://www.lime-technology.com/joomla/unraid-os
Its linux based and has 1 big advantage over windows home server, You only lose 1 drives space for parity/redundancy as opposed to 1/2 the space you have.
Just like WHS you can mix and match drive speeds and sizes, apparently if the server fails you can also remove the drives and read then 1 at a time as well