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.
Best, :-) Marko