Although, we continuously talk about security or the lack of it, the main threat to Cloud computing are power outages according to a Gartner analyst! Outages by various cloud providers have been more common than security breaches, Gartner says, but few businesses are prepared for them. Companies can suffer data losses during power outages which as we have seen in recent incidents caused by routine systems upgrades.
Read more here – https://www.networkworld.com/news/2012/111412-gartner-cloud-security-264268.html