On 07/24/2016 05:44 AM, fred roller wrote:
> First thing I would check is the CMOS battery if you have one or can get to
> it. Sounds like system time is not being held. Go through boot log. If the
> system corrects shortly after a. Nts comes up and b. Network connection is
> established then this may be the case. Couple dollars for a button battery
> will have you right.
>
--->

imbw, but, if battery is too weak to hold clock settings, reversion would
be further than a few days. even if there is a cap holding cmos v.

to prove or disprove, if op is interested is to pull mains for several
minutes, then boot to bios and check clock. no need for a full system
power up.

if clock is correct, not battery. if off by days, may be battery.

iirc, lithium cells and batteries should maintain level voltage over
around 3 years of load rating. after that time, voltage drops at a
sharp rate.

i have seen lithium cmos batteries last over 5 years, but that was just
to see how long they would last.

i normally leave a system up 24/7/365 and only power down for service
or hardware change. running systems on apc ups makes for safe operation
because of ups feed back to system.

about 6 years ago, area lost utility mains and i ran home with a 40Kw
generator. i had to reset low voltage levels of ups so it would not
cycle to batteries when generator dropped in output.

some info on cmos and lithium batteries:

  https://en.wikipedia.org/wiki/Nonvolatile_BIOS_memory
  https://en.wikipedia.org/wiki/Lithium_battery


-- 

peace out.

CentOS GNU/Linux 6.8

tc,hago.

g
.

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Change to Linux os, used by microsoft hackers.
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