Re: clock running fast
From: Brooks Davis (brooks_at_one-eyed-alien.net)
Date: 12/30/04
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Date: Thu, 30 Dec 2004 12:13:18 -0800 To: Javier Henderson <Javier@kjsl.com>
On Thu, Dec 30, 2004 at 11:37:04AM -0800, Javier Henderson wrote:
> > > /usr/sbin/ntpd -c /etc/ntp.conf -p /var/run/ntpd.pid \
> > > - -f /var/db/ntpd.drift
> >
> > It's generally recommended that you never trust your own clock since
> > it's completely crap as time sources go. It's also recommended that you
> > use at least 5 time sources to avoid problems with bad clocks.
>
> But isn't that what the drift file is for, to improve the accuracy of
> the local clock during those times when the configured NTP servers aren't
> available?
Yes, but it can only do so much. The clock crystals in your average PC
are OK as clocks, but much better as thermometers so the drift
calculations are only approximate.
-- Brooks
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