405 petabytes of storage in a modern supercomputer, most of it in tape drives

I'm interested to see how this stacks up against the Backblaze Pod:

http://blog.backblaze.com/2011/07/20/petabytes-on-a-budget-v...

Edit: You'd have to build about 2882 Pods to reach 380 petabytes, but this cluster will be using 380,000 opertons, which implies about 1 terabyte of tape per CPU. For the Pods: The newest cabinets squeeze one petabyte into three-quarters of a single cabinet for $56,696.