From owner-freebsd-questions@FreeBSD.ORG Mon Jul 7 03:54:49 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 5298ADD6 for ; Mon, 7 Jul 2014 03:54:49 +0000 (UTC) Received: from mail-qc0-x236.google.com (mail-qc0-x236.google.com [IPv6:2607:f8b0:400d:c01::236]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 1316B2454 for ; Mon, 7 Jul 2014 03:54:49 +0000 (UTC) Received: by mail-qc0-f182.google.com with SMTP id m20so3315964qcx.13 for ; Sun, 06 Jul 2014 20:54:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:cc:content-type; bh=nq2my6g6Zon4k9xA5tigbJeznAgo1rs2tkLlo95PxSc=; b=PccNzNK1XKV2SFyaFMi4oozliSGHDTbVjR0a3vYdzCcyJUTQDDGBN7DrDBUW3KKjxL QwAQjhlgP5oKG2c7jjSQf20oExF40qTsND0N0oTBMM0+z+duDXnSWEHU7JWts1kZiktw RAu191YemzbU/NAp2oTB1nScnSDycdZ7U/7zMcGZLKdHwRAzFdlXou84gLY/Kgb1dUKP SqDon3oOZ89rSHuPnR88zJsne1duvDTf9I/W1gAWVDQs/sUVnP26nhdc96Oj5H15GxBj g0bfd+Emxm2+phK4eQU8K0PgPTMzZvplnuwZqjMyLrv4yCIKfNLGGKGYqfJftZsPjaL9 sDjA== MIME-Version: 1.0 X-Received: by 10.224.38.71 with SMTP id a7mr11701169qae.44.1404705288051; Sun, 06 Jul 2014 20:54:48 -0700 (PDT) Sender: olivier2553@gmail.com Received: by 10.140.44.97 with HTTP; Sun, 6 Jul 2014 20:54:47 -0700 (PDT) In-Reply-To: <20140707034300.GA60208@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> Date: Mon, 7 Jul 2014 10:54:47 +0700 X-Google-Sender-Auth: ROH0DM0yEmAHGATkqdx4OhdpIxI Message-ID: Subject: Re: Updating and displaying CMOS clock From: Olivier Nicole To: Victor Sudakov Content-Type: text/plain; charset=UTF-8 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 03:54:49 -0000 Victor, >> 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? That is a workaround, but as it is only once a day, it is very cheap resource wise. best regards, Olivier