I have a UPS protecting my computer's power with three 12v 7a batteries.
Recently while I was away for a few hours the power went off and evidently
the UPS ran the batteries down and they failed. I had to replace them.
Perhaps they were about due for replacement anyway but I'll never know for
Anyhow, anyone aware of a timer of some sort I can use on the UPS so after
ten minutes (or whatever) after the AC goes off it turns off the UPS (or
cuts power to omputer)? If I'm there I'd shut down long before ten minutes.
I recall seeing the programs but never installed them on the three
computers I have connected to them.
Got my first, an APC, many years ago which has since gone bad. Loss of
power while computer was running had caused disasters before I had the
APC. Newer machines might be better but I'd never take the risk again.
Ancient Emerson UPS 600. No software I am aware of. No manual and I can't
find one on line with Google. There is a Liebert (evidently they bought
Emerson?) but I'm pretty this is a different (and very large commercial)
I left it on for years while I am regularly away for a couple of hours in
the morning. No lengthy power outages. Now I turn off the system while
I'm away just in case but it is a PITA to reboot the system and restart
all the software most every morning on my slow ancient system.
What's your definition of failed? Open? Won't charge? low capacity?
How long since your last test run?
I've only had half a dozen UPS's over the years, but ALL of them had
shutoff that prevents battery failure from over-discharge.
Failure from long-term overcharge is another issue.
Get one with a port and software that can shut off the computer.
My UPS battery has been "dead" for years. Runs the system for almost
a minute. Around here, we have two types of outages:
1)glitches lasting a second or less that auto-reset themselves.
My UPS works great on those.
2)Those that don't auto-reset and will take hours for manual fix.
With a good battery, mine still wouldn't last long enough for those.
If I press the sleep button before going out, it lasts much longer.
Don't remember anything a chkdsk or fsck wouldn't fix...but there's
still a recent backup justincase.
It can take a significant amount of time for memory to be reloaded
from disk and the system reinitialized when coming out of hibernate.
Sleep mode is almost instantaneous, though. It still takes my laptop
a minute to reconnect to the wireless network, though.
Will it automatically reconnect to a dial-up?
I tried hibernate during shutdown by using the shift key and 'hiberbate'
button instead of 'shut down'. But that wasn't helpful because I still
had to start everything up and reconnect to dial up as usual when I woke
it up. I need to see if it will hibernate when all my usual software is
running and I'm on line.
Hibernate IS shutdown.
The magic happens on restart.
Boot is an interactive process with the hardware that programs all those
flip-flops to the states required for operation in the proper sequence.
Restart from hibernate reads the memory state back off the disk and
I don't know the details, but there's surely something that attempts
to get all the hardware back into the required states.
Problem with dialup is that you may not know the internal states of the
modem or the phone system or the ISP at shutdown or restart.
I'd put an icon on the desktop to restart the internet.
There's probably a way to put it in the resume from hibernate process,
but likely not worth the effort to learn all that.
That's why I gave up on hibernate years ago. Worked well when
16MB of ram was the norm. With a lot of ram, it can take nearly as long
to read if back off the disk as to boot.
Measure the power consumption of your system in sleep mode.
Doesn't take a huge battery to keep it alive for a prolonged power outage.
There is a big difference between "sleep" and "hibernate". Sleep is
a low power operating state, with HDD and screen shut off and
processor "idling" - Hibernate is system state saved, and system shut
down - no processor activity.
Some systems support "wake on ring" or "boot on ring" to start the
computer by calling the modem. Pretty dodgy from distant past memory.
No. Hibernate saves state to the disk before shutting down.
It also happens when going into hibernate. If you shut down the
current state isn't saved so there is no way to restore.
Yes, but that state (and the system state) have to be saved before
they can be restored.
The phone system is the issue. You don't control Ma. ;-)
You don't want hibernate. Use sleep. A computer will reconnect to
the Internet if you're using some "always on" system, like a cable
modem, or DSL. It just takes my laptop longer than I'd like. My
netbook reconnects almost immediately on waking up (from sleep mode).
That's why you use sleep instead of hibernate.
That sounds high but so what?
Right. I have mine set to wake up from sleep and go into hibernate
if the batteries go too low.
On 10/11/2013 4:24 PM, email@example.com wrote:
What should a 2.8 GHZ quad-core desktop draw in sleep?
It's 3W when OFF.
I've not had much success with that.
With aging batteries and a battery gauge that seems ok down to 50% then
drops instantly to 0. I've often had the thing shut down before completing
the hibernate save.
Most backup power supplies have a serial or USB connector for
communicating with the computer. The software CD that is supplied with
the UPS will have a program for monitoring the power and can shut down
the computer after a set period of time or if the battery capacity
reaches a certain point. If you post the make and model number of your
UPS, I may know the characteristics of your unit because I have dozens
of them around here and I picked up a case of batteries yesterday to
repair some of my 1kw+ UPS systems. ^_^
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