From owner-freebsd-questions@FreeBSD.ORG Wed Oct 16 02:35:34 2013 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id D061B45B for ; Wed, 16 Oct 2013 02:35:34 +0000 (UTC) (envelope-from yudi.tux@gmail.com) Received: from mail-la0-x22f.google.com (mail-la0-x22f.google.com [IPv6:2a00:1450:4010:c03::22f]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 5B35E2839 for ; Wed, 16 Oct 2013 02:35:34 +0000 (UTC) Received: by mail-la0-f47.google.com with SMTP id ep20so67104lab.34 for ; Tue, 15 Oct 2013 19:35:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=coJwgFhNKxEZwqIzJoT+AOTW4nC1VKi2guY5IUDbm88=; b=bVDdKOi7BojVdBtqEw+ajW0IU9TE0akIzwQ8OKuQNkfA2/2HeohezY1fg/xj5ggqSj H/vyn1Ho/QcMISpXCjA2Jt4YKcHeCBDV2JvHLc+o7O5gFRjfVr3HmzOg9vXJUjCgxTEe aZwGpOG6/qo2YfE2IlJreQlg3eSnTLxDPvSW7W7NC8MHpYg0JfpYcjlCQqueb6YTg1V3 O7AUEOh6PqmrddbGeP10+dyQFXhS+zKg9ZNJuuJP8T1NXxLomxoMbQrnZ5WCN/OuFw77 nO9VGky88WBxBq5BH9xnv+S5LnMWHL06IEcoifpmTPksVqeOes5U1idQGh2O9e0IrtRT UQjA== MIME-Version: 1.0 X-Received: by 10.112.130.138 with SMTP id oe10mr611068lbb.1.1381890932399; Tue, 15 Oct 2013 19:35:32 -0700 (PDT) Received: by 10.114.82.4 with HTTP; Tue, 15 Oct 2013 19:35:32 -0700 (PDT) In-Reply-To: <525D225B.7050205@fjl.co.uk> References: <525D225B.7050205@fjl.co.uk> Date: Wed, 16 Oct 2013 12:35:32 +1000 Message-ID: Subject: Re: UPS buying suggestion From: yudi v To: Frank Leonhardt Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.14 Cc: freebsd-questions@freebsd.org X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Oct 2013 02:35:34 -0000 > > APC BackUPS Pro 420 to keep three HP microservers alive. What!? Yes, it > works. The power they draw varies greatly depending on what type and how > many drives you have in the bays and (I think with the Microservers) their > processing workload. > Nice to know you got 3 servers running off a 420 VA unit, surprising it can handle 3 units when the power goes off. > All servers are, by definition, connected to the network. They can ping > equipment nearby (just do it from a shell script). If they ping several > pieces of kit on the LAN that don't have a UPS and get no reply, repeatedly > for a few minutes) then it can be assumed something's up, and they can shut > down. As a cross-check they can ping other kit on a UPS and if that's still > alive it proves the NIC is okay. In the event of a suspected failure the > script writes what it's done in a log, emails it to me (for later) and > calls shutdown. > > Nice implementation but I want to have my back-up server in S1 state when not in use, running PING constantly is not possible. Also, I don't have so many devices that need UPS. > > So, what I look for in a UPS is a good automatic self-test (i.e. a "smart" > one) and a standard and easy to change battery (the 7Ah type are cheap, > plentiful and are thus well refined). > > Agreed, having a standard and easy to change battery is preferable but how do I tell what type of battery an UPS takes? I am also looking at APC Smart-UPS SC 420VA 230V, within my budget, it's got AVR, and user replaceable battery, but cannot tell whether it accepts a generic one. -- Kind regards, Yudi