68 lines
3.9 KiB
HTML
68 lines
3.9 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="DC.Type" content="topic" />
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<meta name="DC.Title" content="Start device parity protection" />
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<meta name="DC.Relation" scheme="URI" content="rzalydpy.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2002, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2002, 2006" />
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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>Start device parity protection</title>
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</head>
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<body id="rzalystartdpy"><a name="rzalystartdpy"><!-- --></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">Start device parity protection</h1>
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<div><p>The best time to start device parity protection is when you add new or
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nonconfigured disk units. The <a href="rzalyadd.htm">Add a disk unit or disk pool</a> has
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steps for including disk units in a parity set and starting device parity
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protection. It is also possible to start device parity protection at a later
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time.</p>
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<div class="section"><h4 class="sectiontitle">RAID 5 parity set</h4><ul><li>Systems with IOAs released after V5R2 hold a minimum number of 3 disk
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units in a parity set. The maximum number of disk units in a parity set is
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18.<div class="note"><span class="notetitle">Note:</span> For systems with IOAs released after OS/400<sup>®</sup> V5R2, the minimum number of disk
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units in a parity set is 4. The maximum number of disk units in a parity set
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is 10.</div>
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</li>
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<li>All devices in a parity set must be the same capacity. </li>
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</ul>
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</div>
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<div class="section"><h4 class="sectiontitle">RAID 6 parity set</h4><p>The minimum number
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of disk units in a parity set is 4. The maximum number of disk units in a
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parity set is 18.</p>
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<p>To learn more about how device parity protection is
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implemented, see <a href="rzalydppiop.htm">How device parity protection
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works</a>. <a href="rzalyaspexamples.htm">Examples: Device parity and
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mirrored protection</a> shows some examples of how device parity protection
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can be used in conjunction with mirrored protection.</p>
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</div>
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<div class="section"><h4 class="sectiontitle">Start device parity protection</h4><ol><li>In iSeries™ Navigator,
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expand <span class="uicontrol">Disk Units</span>.</li>
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<li>Select the disk units for which you want to start device parity protection.</li>
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<li>Right-click a selected disk unit and select <span class="uicontrol">Start Parity</span>.</li>
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<li><img src="./delta.gif" alt="Start of change" />Select the level of RAID protection you want.<img src="./deltaend.gif" alt="End of change" /></li>
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<li>From the resulting window, click <span class="uicontrol">Start Parity</span> to
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start device parity protection on the displayed disk units.</li>
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</ol>
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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="rzalydpy.htm">Work with device parity 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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