Hi Gary,
Weird things happen with lightning. If you can try another modem before
going bonkers.
Bill
On Fri, 21 Jul 2000 14:08:32 -0400 (EDT) Gary Nielson
<[EMAIL PROTECTED]> writes:
> I recently bought an APC Backup UPS Pro 650 for my Pentium III 600,
> with
> 2 20 gig internal IDE hard drives, a CD-RW drive, 256 megs of RAM
> and an
> internal 56Kbps V.90 PCI modem. I am running RedHat 6.2 and APC's
> powerchuteplus-4_5_2-1_i386.rpm with a special cable provided by APC
> to
> run between the UPS and my Linux box. I did a self-test of the unit
> with
> the Powerchute Plus software and it passed. Then the next night, our
> area was beseiged by lightning storms and the electricity went off
> for
> just a minute. My computer was off at the time, but plugged into the
> UPS, which was on and now emitting a continuous beep with its red
> light
> on indicating voltage overload.
>
> The plot thickens. I did some brutal testing to try and see if the
> UPS
> software will perform a graceful shutdown when the UPS is unplugged
> from
> the wall. Basically, I ran "sync", then unplugged the UPS. The UPS
> went
> right into voltage overload, even though the computer manufacturer
> says
> my PC runs under 420 watts of power, which is the UPS can handle.
> This
> is a hard test because when the UPS doesn't go to battery, it's
> likely
> unplugged the PC from the wall and the machine does not shutdown
> gracefully and has to run fsck the next time it boots up.
> Nonetheless, I
> tried it again and this time it went into backup battery mode.
> Intermittent problem? No. After pondering this for a while, I
> realized
> the internal modem was NOT online this time!
>
> Suspecting that perhaps there was a conflict between the modem and
> the
> cable running from thte UPS to the serial port, I disconnected the
> cable
> from both sources and tried my brutal test again with the modem
> online.
> What do you think happened? The UPS kicked into voltage overload
> right
> away. So I am *presuming* that this is not a software issue.
>
> Perplexed, I replaced the APC UPS with a BestPower Patriot Pro II
> 750
> (470 watts) without any cabling between the UPS and the machine and
> no
> CheckUPS software installed (that's BestPower's unattended shutdown
> software). I logged onto the Internet with my modem and plugged the
> plug
> from the wall. The Best Power UPS went into battery mode and kept
> the
> machines running.
>
> So then I took my APC UPS and hooked up an old Pentium 200 with 32
> megs
> of RAM, an internal CD player, an external HP SureStore 2000 tape
> drive
> and an external 28.8 modem and made sure everything was running, but
> did
> not install the Powerchute Plus software or hook up the cable
> between
> the unit and the machine. I pulled the plug and the UPS went right
> to
> battery mode and the machines kept running.
>
> Has anyone experienced a similar problem? What does it sound like to
> you? What would have caused the UPS initially to go into voltage
> overload right after the electricity went off and nothing hooked
> into
> the unit was powered up? Is it possible that the modem shorted out
> or
> something and is taking too much power now? Can a modem get that out
> of
> control? I have asked around and never heard of this? What kind of
> advice do you have for me to track down this problem further?
>
> Any help appreciated.
>
> Gary
>
>
>
>
>
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>
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