-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Marko Vojinovic Sent: Saturday, July 02, 2011 13:10 To: CentOS mailing list Subject: Re: [CentOS] Power-outage
On Saturday 02 July 2011 15:45:11 Robert Heller wrote:
At Sat, 02 Jul 2011 14:52:27 +0200 CentOS mailing list centos@centos.org
wrote:
Emmanuel Noobadmin wrote:
It seems to me that it should be possible to have a simple, torch-battery operated, system which will keep the
machine alive
long enough to make a graceful exit.
The problem with your idea is that you'll need a DC to AC inverter that can handle the output current required by your server and
something to
hold the batteries (you'll need more than one because
attempting
to draw a huge current from a normal battery will
either kill it
or at the very least cause it to have a shorter than expected capacity) and everything together, it's probably going to cost more in both money and time to have this thing.
I'm sure you are right, as I know nothing at all about
power supplies.
But surely computers actually use DC, so couldn't my
torch-battery
device just supply the PC components directly?
A PC uses several *different* DC voltages: +12, +5, +3.3,
and several
others and they need to be *precise*. Some of these are
not an exact
multiples of the standard 1.5V Carbon-Zinc cells typicaly used in torch batteries.
I wonder, how is this issue solved in laptops? They use only one DC battery, typically with a single voltage output, AFAIK.
(sorry ctrl-enter sends...)
Laptops, google mother boards, etc have power supply circuits on board. Remember that a switching powersupply taking AC still has dc to dc converters in it after the conditioning stage.
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