I think that a lot of you guys are confusing "Disaster Recovery" with "Business Continuity". Disaster Recovery is a reactive approach. It's what you do to get

I think that a lot of you guys are confusing "Disaster Recovery" with "Business Continuity". Disaster Recovery is a reactive approach. It's what you do to get things back up AFTER a system or site has failed. Business Continuity is a proactive approach. It's what you do to ensure that your critical services will remain viable whenever disaster occurs. In the cases of Heroku, Amazon, Twitter, and many more, their Disaster Recovery strategies have been successful. The fact that they came back online without major data loss is proof of that. Their business continuity strategies, however, have been found wanting.