I've been working on some internal documentation explaining some of our long term plans regarding storage. Initially, I imagined two documents, one an executive overview, and another a complete documentation set. Well, as things are hard to write up the first time and maintain, I decided to make one document, moving all the technical and site specific details to appendices. The end result is that I can now post the primary document sans appendices and make it public.
This is the culmination of a multi-year project to move to reliable commodity based storage and get away from nightly tape backup scenarios that do not scale with today's storage growth. So go ahead, and check out my multi-tier storage whitepaper.