Re: network shutdown and UPS

From: Shenan T. Stanley (news_helper_at_hushmail.com)
Date: 11/28/03 

Date: Thu, 27 Nov 2003 19:29:29 -0600

-- Original Post ---
> i heard about a function of xp that shuts down all
> computers belonging to a network in case of energy loss.
> i have a central ups connected to one unit, in case of
> energy loss, i want all the other network computers also
> to shut down without using a ups for every single
> computer.
> DOES XP SUPPORT THIS?

Shenan Stanley <> wrote:
> Let me help you out here....
> In case of energy loss, you want one computer with the SOLE UPS
> unit to shut down all other computers?
> Think about that. If the other computers do NOT have a UPS, they
> will be OFF - there is no power to them. Therefore you cannot send
> them a signal to tell them to shut down. Also, it is likely that
> you have no NETWORK whenever the power goes off unless your
> switch/hub is also battery-backed up.

killme <> wrote:
> I'd be interested in this if there were such a feature. Instead of a
> UPS for every computer you could have a UPS for every 2 or 3
> computers. But I've never heard of such a feature.

Roger Abell <> wrote:
> Some UPS has ability to use the network.
> On the machine with the UPS attached the software
> that comes with the UPS is set to send the signal
> and the same software installed on the other machines
> is set to listen for the signal.
> Other UPS software allows you to specify something
> that should be run. In this case you could run a script
> that issues a shutdown command to the other machines.

Yes - most good UPS software does come with this "feature" - however, in the
case that there is only one UPS hooked to one of the machines (and if there
is none hooked to the networking equipment) - it is worthless when the power
goes off. Now if you have your Network Hub/Switch on a UPS, each of your
other machines on a UPS and you are using a protocol that would keep you
from losing contact with your other machines when the power goes off - you
should be fine with using this application. But if you have a normal (home)
setup where the Network Hub/Switch (if you have one) is not battery
back-up'ed and/or you get your IP from the cable/dsl modem through DHCP -
there is a DISTINCT possibility you will have NO way of issuing these
commands. It is a great idea, but only if you think it through. =) 

-- 
Shenan Stanley
"Just trying to help"

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