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According to the Ponemon Institute’s latest “Cost of Data Center Outages” study, the average cost of an unplanned data center outage has steadily increased from approximately $500,000 in 2010 to nearly $750,000 in 2016, a 38 percent increase. What’s also intriguing about the report is that data center outages aren’t just costly, they’re extremely common. Total outages occurred once a year on average and device-level outages occurred every two months among the U.S.-based data centers surveyed.
As we let these figures sink in, and before answering what’s wrong with the Rack Power Circuit Monitoring Chart presented above, let me provide some background about this graphic:
First, an Observation from this Picture
Although the servers in this rack are equally plugged into both circuits they are not drawing power equally from both circuits.
What Is Wrong with This Picture?
A 30amp 208v circuit breaker by US code de-rated to 80% can safely supply 24amps. However, the combined load on the two circuits at peak is approaching 25amps. Though neither circuit is oversubscribed in normal operating conditions, if one circuit fails…
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