81 lines
5.4 KiB
HTML
81 lines
5.4 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Plan for power loss" />
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<meta name="abstract" content="To ensure that your system is available when you need it, you need to make sure that it has an adequate supply of power, and that it is protected in the event that power is lost." />
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<meta name="description" content="To ensure that your system is available when you need it, you need to make sure that it has an adequate supply of power, and that it is protected in the event that power is lost." />
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<meta name="DC.Relation" scheme="URI" content="rzalwprevent_unplanned.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rzalwpower" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Plan for power loss</title>
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</head>
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<body id="rzalwpower"><a name="rzalwpower"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Plan for power loss</h1>
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<div><p>To ensure that your system is available when you need it, you need
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to make sure that it has an adequate supply of power, and that it is protected
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in the event that power is lost.</p>
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<div class="section"><h4 class="sectiontitle">Power requirements</h4><p>Part of the planning process
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for your system is to ensure that you have an adequate power supply. You need
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to understand your server's requirements and then enlist the aid of a qualified
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electrician to help install the proper wiring, power cords, plugs and power
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panels. For details on how to ensure that your system has adequate power,
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see <a href="../icbase/iphad/rpower.htm">Plan for power</a>.</p>
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</div>
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<div class="section"><h4 class="sectiontitle">Redundant power supplies</h4><p><img src="./delta.gif" alt="Start of change" />Some IBM<sup>®</sup> Systems are
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designed with a fully redundant power system. A redundant power supply is
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a feature that prevents an unplanned outage by providing power if one power
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supply fails.<img src="./deltaend.gif" alt="End of change" /></p>
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<p><img src="./delta.gif" alt="Start of change" />Some systems support a dual line cord feature.
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This allows you to provide power to the system from two different external
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power sources. This can avoid an unplanned outage if one power source fails. <img src="./deltaend.gif" alt="End of change" /></p>
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</div>
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<div class="section"><h4 class="sectiontitle">Uninterruptible power supplies</h4><p>Even when you have
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an adequate power supply, there are still times when you may lose power, such
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as during a storm. To prevent unplanned outages that result from losing power,
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you may need to invest in hardware specifically designed to keep your server
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going when power is lost. One such piece of hardware is an <dfn class="term">uninterruptible
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power supply (UPS)</dfn>. You can use a UPS to provide auxiliary power to
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your processor, disks, system console, and any other devices that you think
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are necessary. Uninterruptible power supplies provide the following advantages:</p>
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<ul><li>Let you continue operations during brief power outages (brown outs).</li>
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<li>Protect the system from voltage peaks (white outs).</li>
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<li>Provide a normal end of operations in case of an extended power outage,
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which can reduce your recovery time when you restart your server. For information
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on how to write a program that will help you control your server’s shutdown
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in these conditions, see <a href="../rzahr/rzahrovrvwco.htm">Control
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system shutdown using a power handling program</a>.</li>
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</ul>
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<p>For information on which uninterruptible power supplies
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are compatible with your server, see <a href="../icbase/iphad/ups.htm">Uninterruptible
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power supply systems</a></p>
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</div>
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<div class="section"><h4 class="sectiontitle">Generator power</h4><p>If you think you could experience
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an extended power failure, you might want to consider purchasing a generator.
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A generator goes a step further than a UPS in that it enables you to continue
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normal operations during longer power failures.</p>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzalwprevent_unplanned.htm" title="One way to approach availability is to try to prevent unplanned outages. You can use these different methods to ensure that your system experiences as little unplanned downtime as possible.">Prevent unplanned outages</a></div>
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</div>
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</div>
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</body>
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</html>
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