Byte and Switch has an initial article on what they are calling the World's largest SAN environments. They give some interesting, if not brief, descriptions of the SANs for JP Morgan Chase, U.S. DoD, NASA, San Diego Supercomputer Center and Lawrence Livermore National Labroatory.
These organizations have pushed over the petabyte level and the goal of the study by Byte and Swtich is to see how companies scale their storage infrastructure and what vendors they are working with. It was interesting to me to see how many are using SGI (I still really like SGI)
Assuming they will divulge more about this list in the future, I'll be anxious to read more of the details. Besides....forget about Petabytes -- let's talk Exabytes!
Check out the Byte and Switch article here