From owner-freebsd-questions Wed Feb 17 22:36:37 1999 Delivered-To: freebsd-questions@freebsd.org Received: from base486.home.org (imdave.pr.mcs.net [205.164.3.77]) by hub.freebsd.org (Postfix) with ESMTP id 34120110C7 for ; Wed, 17 Feb 1999 22:36:17 -0800 (PST) (envelope-from imdave@mcs.net) Received: (from imdave@localhost) by base486.home.org (8.9.2/8.9.2) id AAA18547; Thu, 18 Feb 1999 00:13:51 -0600 (CST) Date: Thu, 18 Feb 1999 00:13:51 -0600 (CST) From: Dave Bodenstab Message-Id: <199902180613.AAA18547@base486.home.org> To: dan@jgl.reno.nv.us, freebsd-questions@FreeBSD.ORG Subject: Re: Time drift: hardware or software? Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG From: "Dan O'Connor" > > I'm running 3.1-STABLE with a user-ppp connection to the Internet, and I'm > running ftpdate from cron every two hours. While I don't get 'calcru minus > time' errors, my system clock drifts something fierce--about -110 seconds > per hour. > > Is this hardware related, or is FreeBSD's time counter really off? Can I do > anything about it? Take a look at ftp://koobera.math.uic.edu/www/software/clockspeed-0.62.tar.gz and http://pobox.com/~djb/proto/utctai.html. Although my system clock does not drift anywhere near what you are reporting, I set my time once with ntpdate. Clockspeed then keeps the system clock accurate to within .1 second. I run xntpd as a server to sync my other systems. Every week or so, I re-adjust clockspeed with an external xntpd server when I happen to think about it. Dave Bodenstab imdave@mcs.net To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message