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Date:      Thu, 30 Dec 2004 12:13:18 -0800
From:      Brooks Davis <brooks@one-eyed-alien.net>
To:        Javier Henderson <Javier@kjsl.com>
Cc:        David Talkington <dtalk@u.washington.edu>
Subject:   Re: clock running fast
Message-ID:  <20041230201318.GE2987@odin.ac.hmc.edu>
In-Reply-To: <20041230193704.GS64741@mta-a.kjsl.com>
References:  <41D43A7A.2000500@bluewin.ch> <20041230110953.T17743@atlantis.flyingjoke.org> <20041230193244.GB2987@odin.ac.hmc.edu> <20041230193704.GS64741@mta-a.kjsl.com>

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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
> >=20
> > 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.
>=20
> 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

--=20
Any statement of the form "X is the one, true Y" is FALSE.
PGP fingerprint 655D 519C 26A7 82E7 2529  9BF0 5D8E 8BE9 F238 1AD4

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