Its good stuff. Try not to pass that around to far, the article is normally only available to people with a subscription, but let subscribers give out a link to people, but are asked not to abuse it.
http://lwn.net/SubscriberLink/237924/10d2b53f40025b04/
Very interesting read.
Only problem I have the article is that his supporting article links do not work for me :(
http://labs.google.com/papers/disk_failures.html
That one I read already. I meant the two main support links he had in the document.