54 lines
3.1 KiB
HTML
54 lines
3.1 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 name="DC.Type" content="topic" />
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<meta name="DC.Title" content="Plan for device parity protection" />
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<meta name="DC.Relation" scheme="URI" content="rzalyprtctvsdtalss.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2002, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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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 device parity protection</title>
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</head>
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<body id="hdrplngdpp"><a name="hdrplngdpp"><!-- --></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 device parity protection</h1>
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<div><div class="section"><h4 class="sectiontitle">RAID 5</h4><div class="p">Systems with IOAs released after
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V5R2 hold a minimum number of 3 disk units in a parity set; the maximum number
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of disk units in a parity set is 18.<div class="note"><span class="notetitle">Note:</span> Systems with IOAs released prior
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to V5R2 of OS/400<sup>®</sup>,
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the minimum number of disk units in a parity set is 4. The maximum number
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of disk units in a parity set is 10.</div>
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</div>
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</div>
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<div class="section"><h4 class="sectiontitle">RAID 6</h4><p>The minimum number of disk units
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in a parity set is 4. The maximum number of disk units in a parity set is
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18.</p>
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<p>To learn more about how device parity protection is implemented,
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see <a href="rzalydppiop.htm">How device parity protection works</a>. <a href="rzalyaspexamples.htm">Examples: Device parity and mirrored protection</a> shows some examples of how device parity protection can
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be used in conjunction with mirrored protection.</p>
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</div>
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<div class="note"><span class="notetitle">Note:</span> If your goal is to have a system with data loss protection and concurrent
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maintenance repair, a combination of mirrored protection and device parity
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protection is recommended. </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="rzalyprtctvsdtalss.htm">Plan for disk protection</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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