[otterley]

What data center was it?

I can't remember the last time there was a power outage at a Tier I or II data center -- they're all N+1, from the cabinet PDUs to the distribution units to the UPSes to the diesel generators. Some even go so far as to connect to multiple in-feeds from different utility providers.

At my company, every piece of server, storage, and network equipment we own is connected via redundant power supplies to different circuits (except for nonessential equipment like monitors; we can simply re-plug them into the functioning circuit). I can't imagine running a datacenter any other way.