[CentOS] Power-outage

[m.roth at 5-cent.us]

Blake Hudson wrote:
> From: m.roth at 5-cent.us
>> Nicolas Thierry-Mieg wrote:
>>> Colin Coles wrote:
>>>> On Friday 01 July 2011 12:05, Timothy Murphy wrote:
>>>>> Any advice or suggestions gratefully received.
>>>> If you are thinking of the UPS route a caveat: I have several HP
>>>> servers and most of them will not work on cheap UPS's as they do not
>>>> produce the pure sine wave modern HP machines require but rather a
>>>> crude stepped voltage.
>>> perhaps naively, I'm surprised: doesn't this mean they put crappy PSUs
>>> in those servers?
>>> I thought decent PSUs were expected to deal with dirty input AC?
>> I agree. Esp. since, other than in datacenters, *most* electric power is
>> pretty crappy.
>
> I would have to disagree. They probably put high efficiency active PFC
> power supplies in the servers to save YOU money. You could buy a cheaper
> PSU that will not be as efficient and would thus cost you more in
> electric costs and create more heat (which would again cost you more in
> AC bills and reduce server density). The active PFC supplies are

Except that I expect datacenters to have conditioned power, and so they
can cheap out with the servers, with the same expectations. And I would
expect consumer-grade systems to not have fancy power units, but ones that
won't die on power irregularities from the electric co's.
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