At 10:36 AM 12/21/2011, Dazed_75 wrote:
The manufacturer states rather
strongly that unplugging the UPS is a BAD way to test it since that also
removes the ground circuit. So far, my best idea is to go out to
the electrical box and flip the relevant circuit breaker off.
The point though, is even that only tests the UPS. I would need to
leave it off long enough for the UPS to request (via that USB cable) that
the computer do an orderly shutdown which could take 30 minutes or more.
Whoa!
My understanding is that when a power failure occurs, the UPS takes over
supplying power immediately - and also signals the system to shut down in
an orderly fashion....the 30 minutes you mention, IMHO, deals with the
amount of time the UPS would run the system if it did not shut down - on
my system, by utilizing various power outlets on the UPS, I can somewhat
control WHAT components shut down right away.
What if you plug the UPS into a switchable power strip - then turn it
off?
And worse, I
would not know if a non-event meant a failure on the part of the UPS
signaling system or the Linux side not making use of the signal event
since I still have no idea what to check for.
I bring all this up because my last UPS failed to protect the computer so
now I am paranoid about it.
On Wed, Dec 21, 2011 at 8:27 AM, Alex Dean
<alex@crackpot.org>
wrote:
- On Dec 21, 2011, at 2:06 AM, Dazed_75 wrote:
- > I just put in a replacement UPS (Tripp-Lite G1010USB) and
connected the USB cable. I see that Ubuntu 10.04 does see it but I
have no idea how to tell if it will actually pay attention if the UPS
ever tells it to shut down. Short of a power failure, how can one
know?
- Unplug the UPS from the wall?
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