From owner-freebsd-questions@FreeBSD.ORG Tue Dec 2 11:14:34 2014 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 62C782FF for ; Tue, 2 Dec 2014 11:14:34 +0000 (UTC) Received: from mail-qg0-f42.google.com (mail-qg0-f42.google.com [209.85.192.42]) (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 17DE29DE for ; Tue, 2 Dec 2014 11:14:33 +0000 (UTC) Received: by mail-qg0-f42.google.com with SMTP id z107so9214438qgd.29 for ; Tue, 02 Dec 2014 03:14:27 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=w7cuS2kpVZb2ab80vkohuxhj083gjL+4pRmd60apRaU=; b=Jx0zXUwUc0XcuCjc+nzkZ0CMTyXhXTypQbDO9E/M2J/I6fYqVFesDqBvO1CuGyw0Xs d164DehlXz4fwtPxkxaoy+HSCDuBZfNY6uWnn3Y3KDaB0zUAqL38P9MAtlRqrIDTuwZ9 h+LfnQ7kOISHs0fBIEWwi3CXQE8qCFwHK93EvoUTMAJ0cNItc8xA66Na+TpNtsBqoW97 QQx7cA0eOxKH3Ciwnm8BMIYtAArdkLPMfveO8uhB1ZlffqOFvn4h4SEKVGZoSJf9Cr/c b4+2dfwiluENVjID32rfBMaSxtmLYgADL0Dh1pS3G6fGKlGaPs5Wxi3ehMCBsIldwZ4c BccA== X-Gm-Message-State: ALoCoQkQjN5SuVwq+HVz/hDQsrugUmSQio69NjIgBz18U8w31zstwzXdjGzd2T8ELgneu/2xWOLL MIME-Version: 1.0 X-Received: by 10.224.11.137 with SMTP id t9mr95644480qat.10.1417518493136; Tue, 02 Dec 2014 03:08:13 -0800 (PST) Received: by 10.140.85.179 with HTTP; Tue, 2 Dec 2014 03:08:12 -0800 (PST) In-Reply-To: <547d74b4.qPmD4NU27Cup8Ccm%perryh@pluto.rain.com> References: <54777AB1.9010800@bluerosetech.com> <54779629.302@bluerosetech.com> <5478BD4F.7020306@yahoo.com> <5478BEE6.30308@bluerosetech.com> <5478CC08.9090307@yahoo.com> <20141128204722.561f948e@archlinux> <5478F16A.80605@yahoo.com> <54791d3a.w/pI0kak03d+3nKC%perryh@pluto.rain.com> <20141129113405.3d1bd1d6@X220.alogt.com> <54798883.saa13h6lE6rPwZCf%perryh@pluto.rain.com> <20141130212746.6d5eaf1f@X220.alogt.com> <547bd5bd.dKE49fHIj28ERZyT%perryh@pluto.rain.com> <20141201140037.584faf7e@X220.alogt.com> <547d74b4.qPmD4NU27Cup8Ccm%perryh@pluto.rain.com> Date: Tue, 2 Dec 2014 06:08:12 -0500 Message-ID: Subject: Re: OT: UPS for FreeBSD From: Alejandro Imass To: Perry Hutchison Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.18-1 Cc: Erich Dollansky , kudzu@tenebras.com, FreeBSD Questions X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 02 Dec 2014 11:14:34 -0000 On Tue, Dec 2, 2014 at 3:13 AM, Perry Hutchison wrote: > Alejandro Imass wrote: > > > ... at high power you would still need to employ high voltage to > > decrease loss in the distribution, or you would need to employ > > ridiculously large conductor bars to be able to distribute > > low-voltage DC even in the most modest data center ... > > Oh, for Pete's sake! What part of "integrate a UPS with the PSU" > ( > http://lists.freebsd.org/pipermail/freebsd-questions/2014-November/262603.html > ) > is so hard to understand? > > Note that I was NOT discussing the integration of the battery to the server which essentially the design of a laptop. I was discussing using DC for power distribution in general which currently is impractical. Best, -- Alejandro Imass