Its still an amazing document--even if its a little crusty in terms of old technology. In terms of building your own 4-seat Xsan, you can do no better than this free document.
Stay tuned for our next post. I'll take the components of this doc and fully update them for equipment available now in 2009. There are also a few holes to plug in terms of available support, training, and other items like VPN routers--we'll plug those with the best available gear available today.