[olug] Machine randomly powers off

[Ben Hollingsworth]

Well, the power supply was NOT the problem.  The box had powered off again when I got home from work tonight.  I bypassed the UPS and plugged the box straight into the wall, so we'll see how that works out.  I've got a number of other low-current things plugged into that UPS, and none of them has ever shown any problems.  Maybe it's just a bad outlet.  We'll see.


On October 17, 2016 11:39:06 PM CDT, Ben Hollingsworth <obiwan at jedi.com> wrote:
>There are no spare drives.  All 6 are necessary for the system to
>function (RAID5).
>
>After the box powered off twice today, I followed the numerous
>suggestions and swapped out my older, larger Seasonic PS for a (barely)
>newer, smaller Coolmaster that I had on hand.  Due to the random nature
>if these shutdowns, it'll be the better part of a week before I know
>for sure if it's really helping.
>
>Thanks for all the suggestions.
>
>
>On October 17, 2016 8:09:17 PM CDT, Kevin <sharpestmarble at gmail.com>
>wrote:
>>Swap out the PS, see if it runs well with it swapped. You could also
>>try
>>disconnecting the (spare?) drives and see if it runs fine with just
>one
>>drive, possibly booted off a USB thumbdrive or other non-SATA/IDE/etc
>>drive
>>
>>On Mon, Oct 17, 2016 at 6:44 PM, Jay Bendon <jaybocc2 at gmail.com>
>wrote:
>>
>>> check the motherboard for blown caps, test with known good psu.  It
>>is most
>>> likely one of the two.  IF you have a good UPS it should prevent
>most
>>power
>>> sags and swells so its probably not external power causing the
>issue.
>> I
>>> assume also its not a thermal shutdown since you said fanspeeds (and
>>> temps?) are all ok.
>>>
>>> --Jay
>>>
>>> On Mon, Oct 17, 2016 at 2:11 PM, Chad Homan <choman at gmail.com>
>wrote:
>>>
>>> > I had a similar issue, but it turned out to be a dimm chip going,
>>does it
>>> > hurt to run memtest just saying
>>> >
>>> > On Oct 17, 2016 3:45 PM, "Jason Troy" <jason.troy at gmail.com>
>wrote:
>>> >
>>> > > +1 to the power supply. That's been my cause on several
>>occasions. I
>>> > don't
>>> > > even try the other steps anymore.
>>> > > You might also inspect Mobo for any bulged caps while you are in
>>there.
>>> > >
>>> > > On Oct 17, 2016 11:50 AM, "Justin Reiners"
>><justin at hotlinesinc.com>
>>> > wrote:
>>> > > >
>>> > > > Fwiw I'd replace the power supply, they are cheap.
>>> > > >
>>> > > > On Oct 17, 2016 11:42 AM, "Ben Hollingsworth"
><obiwan at jedi.com>
>>> wrote:
>>> > > >
>>> > > > > Hey all,
>>> > > > >
>>> > > > > I'm seeing some weird problems with my desktop box (Ubuntu
>>16.04),
>>> > and
>>> > > I'm
>>> > > > > not sure what to look for next.  It just randomly (as far as
>>I can
>>> > > tell)
>>> > > > > powers off every so often.  It might stay up for a few days,
>>or it
>>> > > might
>>> > > > > say up for a few minutes.  I've witnessed it a couple times
>>when
>>> I'm
>>> > > using
>>> > > > > the console, but it usually happens when it's sitting idle. 
>>It
>>> > always
>>> > > > > powers on & boots just fine when I press the power button.
>>> > > > >
>>> > > > > There's no mention of anything in the OS logs.  The machine
>>just
>>> dies
>>> > > cold.
>>> > > > >
>>> > > > > MRTG graphs show nothing unusual related to heat, fan
>speeds,
>>or
>>> > > > > voltages.  A visual inspection shows all fans spinning.
>>> > > > >
>>> > > > > The UPS (which is plenty big & has a new-ish battery)
>doesn't
>>hint
>>> of
>>> > > any
>>> > > > > problems.  The BIOS is set to power back on if it shuts down
>>due
>>> to a
>>> > > power
>>> > > > > loss, but that doesn't happen, so I don't think it's related
>>to
>>> > > external
>>> > > > > power.  I'm running a Seasonic 700W PS that's been working
>>great
>>> for
>>> > > > > years.  I do still have my old desktop box from which I
>could
>>swap
>>> > the
>>> > > > > (smaller) PS, but I haven't tried that yet.
>>> > > > >
>>> > > > > It has 4 sticks of RAM (2x4GB, 2x8GB), and I've swapped them
>>out in
>>> > all
>>> > > > > combinations, and swapped slots.  Memtest runs for hours
>with
>>no
>>> > > errors, so
>>> > > > > I don't think it's RAM-related.
>>> > > > >
>>> > > > > I also still have the mobo/CPU/RAM from my old desktop box
>>(which
>>> is
>>> > > > > significantly slower), but those aren't individually
>>> interchangeable
>>> > > with
>>> > > > > the new system.  Swapping all 6 of my hard drives between
>>systems
>>> is
>>> > > time
>>> > > > > consuming, so I'd like to diagnose further before doing
>that.
>>> > > > >
>>> > > > > Before I go randomly replacing expensive or time consuming
>>parts,
>>> > where
>>> > > > > else should I be looking for the cause?  This is *really*
>>annoying!
>>> > > > >
>>> > > > > --
>>> > > > > *Ben "Obi-Wan" Hollingsworth* obiwan at jedi.com <mailto:
>>> > obiwan at jedi.com>
>>> > > > > www.Jedi.com <http://www.jedi.com>
>>> > > > > The stuff of earth competes for the allegiance I owe only to
>>the
>>> > > > > Giver of all good things, so if I stand, let me stand on the
>>> > > > > promise that You will pull me through. /-- Rich Mullins/
>>> > > > >
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>-- 
>Ben "Obi-Wan" Hollingsworth
>obiwan at jedi.com, http://www.jedi.com

-- 
Ben "Obi-Wan" Hollingsworth
obiwan at jedi.com, http://www.jedi.com