One of my customers suffered a power outage when a branch knocked down a
power line and blew up a transformer. The surge took out lots of stuff.

Their server lost 2 hard drives and the RAID controller. I'm blaming it
on the branch even though I don't really know what really took them out.

They want a 3 node cluster to improve redundancy. This is a hardware
question. They don't want a single point of failure (RAID controller).
I believe the easy answer is 3 individual computers. Are there other
configurations that will satisfy their need? Blade maybe?

They said they lost almost a $1,000.00 and hour. The server went down
Tuesday and was finally functional Friday. They are a 24/7 operation.