Re: Horrible clock drift help
- From: "Richard B. Gilbert" <rgilbert88@xxxxxxxxxxx>
- Date: Sun, 18 Jun 2006 00:14:16 -0400
Jeremy Parrish wrote:
Greetings,
We just bought 7 new servers from SuperMicro, and they all have the same
problem. They all gain about 1 second every 10 seconds or so (10% too
fast). I have tried various versions of Linux kernels (in particular,
2.4.27, 2.6.15, 2.6.15-smp, 2.6.16.20...) with all kinds of kernel
options (noapic, acpi=off, clock=tsc, the list goes on...). There is no
noticeable difference between any of those.
The servers use the Intel E7230 chipset and have Pentium D 805
processors. Ntpd does not seem to correct the clock at all (I've let it
run for more than a day). I've tried installing adjtimex, and it adjusts
the rate of the clock by about -3000 seconds per day, but I would
something more accurate.
Is there a way I can make ntpd play nice with such a horrible drift?
Thanks in advance,
Jeremy
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Suggest you purchase hardware that works correctly!! Ntpd cannot correct a frequency error greater than 500 parts per million or about 43 seconds per day. Most computers have native clock frequency errors of less than 50 PPM.
Thank you for warning us about SuperMicro. I will make certain that I never buy their products!!!
.
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