BackBlaze, an online backup company, posted a great blog article a while back about building their custom 67TB servers for just under $8,000. They even include all the how to, and a link to the custom case manufacturer if you wanted to do it yourself: <a href="http://blog.backblaze.com/2009/09/01/petabytes-on-a-budget-how-to-build-cheap-cloud-storage/" rel="nofollow">http://blog.backblaze.com/2009/09/01/petabytes-on-a-budget-h...</a>