From owner-freebsd-questions@FreeBSD.ORG Mon Jul 7 04:57:24 2014 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 94F805B5 for ; Mon, 7 Jul 2014 04:57:24 +0000 (UTC) Received: from relay2.tomsk.ru (mail.sibptus.tomsk.ru [212.73.124.5]) by mx1.freebsd.org (Postfix) with ESMTP id F2E0A2874 for ; Mon, 7 Jul 2014 04:57:23 +0000 (UTC) X-Virus-Scanned: by clamd daemon 0.98.1 for FreeBSD at relay2.tomsk.ru Received: from admin.sibptus.tomsk.ru (account sudakov@sibptus.tomsk.ru [212.73.125.240] verified) by relay2.tomsk.ru (CommuniGate Pro SMTP 5.1.16) with ESMTPSA id 35936427; Mon, 07 Jul 2014 11:57:22 +0700 Received: from admin.sibptus.tomsk.ru (sudakov@localhost [127.0.0.1]) by admin.sibptus.tomsk.ru (8.14.7/8.14.7) with ESMTP id s674vK7m063947; Mon, 7 Jul 2014 11:57:21 +0700 (NOVT) (envelope-from vas@mpeks.tomsk.su) Received: (from sudakov@localhost) by admin.sibptus.tomsk.ru (8.14.7/8.14.7/Submit) id s674vKue063946; Mon, 7 Jul 2014 11:57:20 +0700 (NOVT) (envelope-from vas@mpeks.tomsk.su) X-Authentication-Warning: admin.sibptus.tomsk.ru: sudakov set sender to vas@mpeks.tomsk.su using -f Date: Mon, 7 Jul 2014 11:57:20 +0700 From: Victor Sudakov To: Olivier Nicole Subject: Re: Updating and displaying CMOS clock Message-ID: <20140707045720.GA63735@admin.sibptus.tomsk.ru> References: <20140706153206.GA46262@admin.sibptus.tomsk.ru> <53B9BC4B.4030609@gooch.io> <20140707021022.GB58025@admin.sibptus.tomsk.ru> <53BA0493.1030205@gooch.io> <20140707034300.GA60208@admin.sibptus.tomsk.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Organization: AO "Svyaztransneft", SibPTUS X-PGP-Key: http://www.dreamwidth.org/pubkey?user=victor_sudakov X-PGP-Fingerprint: 10E3 1171 1273 E007 C2E9 3532 0DA4 F259 9B5E C634 User-Agent: Mutt/1.5.21 (2010-09-15) Cc: "freebsd-questions@freebsd.org" X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 07 Jul 2014 04:57:24 -0000 Olivier Nicole wrote: > > >> The drift on clocks integrated into computers these days is pretty > >> terrible AFAIK, which is why NTP is so widespread. > > If the hardware clock is updated maybe daily, I don't expect any > > significant drift. > > If all you need is a daily update, why not a cron to restart ntp once > a day? Because no matter how often you restart ntp, it does not update the CMOS (hardware) clock. My question was about updating the CMOS clock. -- Victor Sudakov, VAS4-RIPE, VAS47-RIPN sip:sudakov@sibptus.tomsk.ru