Physical Security for Cloud Data Centers

As I’ve watched the momentum of the Cloud, it’s caused me to reflect upon earlier discussions about data center physical security.  It’s long been my opinion that physical security will soon emerge (or re-emerge) as a top issue in data center planning, since businesses and consumers alike are increasingly reliant on the data and transaction processing being concentrated into these facilities.

In the late ‚ 1990’s, I was in the UK prospecting for data center space for an initial European footprint for E*Trade.  During that prospecting trip, I toured an old AT&T data center in a remote area North of London.  This facility was surrounded by earthen berms at least eight feet high, as well as a very sturdy barbed wire fence.  Why all this for a facility in the middle of the country side?