From owner-freebsd-stable@FreeBSD.ORG Thu Dec 30 20:12:59 2004 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id C76AA16A4CE for ; Thu, 30 Dec 2004 20:12:59 +0000 (GMT) Received: from odin.ac.hmc.edu (Odin.AC.HMC.Edu [134.173.32.75]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9AC7743D1D for ; Thu, 30 Dec 2004 20:12:59 +0000 (GMT) (envelope-from brdavis@odin.ac.hmc.edu) Received: from odin.ac.hmc.edu (localhost.localdomain [127.0.0.1]) by odin.ac.hmc.edu (8.13.0/8.13.0) with ESMTP id iBUKDIvm022147; Thu, 30 Dec 2004 12:13:18 -0800 Received: (from brdavis@localhost) by odin.ac.hmc.edu (8.13.0/8.13.0/Submit) id iBUKDI20022146; Thu, 30 Dec 2004 12:13:18 -0800 Date: Thu, 30 Dec 2004 12:13:18 -0800 From: Brooks Davis To: Javier Henderson Message-ID: <20041230201318.GE2987@odin.ac.hmc.edu> References: <41D43A7A.2000500@bluewin.ch> <20041230110953.T17743@atlantis.flyingjoke.org> <20041230193244.GB2987@odin.ac.hmc.edu> <20041230193704.GS64741@mta-a.kjsl.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="o0ZfoUVt4BxPQnbU" Content-Disposition: inline In-Reply-To: <20041230193704.GS64741@mta-a.kjsl.com> User-Agent: Mutt/1.4.1i X-Virus-Scanned: by amavisd-new X-Spam-Status: No, hits=0.0 required=8.0 tests=none autolearn=no version=2.63 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on odin.ac.hmc.edu cc: Federico Galvez-Durand Besnard cc: freebsd-stable@freebsd.org cc: David Talkington Subject: Re: clock running fast X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 30 Dec 2004 20:12:59 -0000 --o0ZfoUVt4BxPQnbU Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable 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 --o0ZfoUVt4BxPQnbU Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQFB1GFdXY6L6fI4GtQRAv1tAKCCwOm7wjx7AOFyHvwwO0B/RYnArQCghlum Xd5m+g1NIN9eDHX3mir+xE4= =HFdh -----END PGP SIGNATURE----- --o0ZfoUVt4BxPQnbU--