What kind of standards have you seen?

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kevinware

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Louisville, KY
I guess what I am trying to ask is this. Out of all the data centers you guys have designed 645 compliant and not. How many were truly had electrical redundancy? I operate out of the corporate building for healthcare provider. We have a main data center in the corporate building and we have satellite data centers from five hospitals networked back to corporate. At corporate we have it pretty good for the age of the building. It breaks down like this. We a number of server racks with two 208V 30A circuits ran to them from six 150KVA PDU's placed through out the data center. Three on one 500KVA UPS and the other three on another 500KVA UPS. This is backed up by a single 1500KW generator and the utility is brought in on a single feed. We at corporate are not 100% electrically redundant in my opinion. I have a point bare with me. For years now upper management has tried to reproduce the corporate setup out in the server rooms of the hospitals but on a much smaller scale. This has not worked out real well in the passed so things are going to change. Do you guys deal with server rooms that are on a single UPS? And have you ever provided one circuit to a server rack racked with servers that have duel power supplies? Please don't misunderstand I know how to do this. What I am asking is how common is it? We are an HP shop if you will, and HP does provide all equipment we would ever need. The issue is this 99.999 up time BS I keep hearing about. Where have you guys drawn the line on redundancy????

Thanks for your time,

Kevin
 
Redundancy = $$$$

I think you are on the right track in asking; how much is enough? unfortunately, it depends on who you talk too. It seems everyone has their own idea on the matter. Basically, if you have a critical system that cannot go down, then you must design the system so you do not have a single point of failure. As you can imagine, that can become quite extensive.

In any event, without redundant utility feeds, it would seem you couldn't consider redundancy, unless you have n+1 generation capability.
 
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