Ah but I don't think that is true. I think you could buy three of the xserve sled modules and load the up with the nice economical 2TB a pice HDs and you would then have six total TB.

But here is why I am instead going to the Apple site and buying a 1TB with sled module. I won't void the Apple warranty. The only reason. I don't want to hear,"oh, you bought the sleds separately and used 2TB third party? We don't cover that." They weill say they pick the super groovy cream of the crop drives for server class level specs and it is all BS.

But it works so I'll stick the 2TB into my desktop.