77 lines
4.3 KiB
HTML
77 lines
4.3 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="topic" />
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<meta name="DC.Title" content="Determine the level of protection that you want" />
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<meta name="DC.Relation" scheme="URI" content="rzalymirrorplan.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzalylopdet.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzalylopdsk.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzalyiobuslevelprotection.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzalylopctl.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzalylopiop.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzalylopbus.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzalytower.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzalyring.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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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="hdrmirror3" />
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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>Determine the level of protection that you want</title>
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</head>
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<body id="hdrmirror3"><a name="hdrmirror3"><!-- --></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">Determine the level of protection that you want</h1>
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<div><p>The level of mirrored protection determines whether the system keeps running
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when different levels of hardware fail. The level of protection is the amount
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of duplicate disk-related hardware that you have. The more mirrored pairs
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that have higher levels of protection, the more often your system will be
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usable when disk related hardware fails. You may decide that a lower level
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of protection is more cost effective for your system than a higher level. </p>
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<p>When determining what level of protection is adequate, you should consider
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the relative advantages of each level of protection with respect to the following: </p>
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<ul><li>The ability to keep the system operational during a disk-related hardware
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failure.</li>
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<li>The ability to perform maintenance concurrently with system operations.
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To minimize the time that a mirrored pair is unprotected after a failure,
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you may want to repair failed hardware while the system is operating.</li>
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</ul>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="rzalylopdet.htm">Details: Levels of protection</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="rzalylopdsk.htm">Disk-unit level protection</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="rzalyiobuslevelprotection.htm">Input/output bus level protection</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="rzalylopctl.htm">Input/output adapter level protection</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="rzalylopiop.htm">Input/output processor level protection</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="rzalylopbus.htm">Bus-level protection</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="rzalytower.htm">Expansion-unit level protection</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="rzalyring.htm">Ring-level protection</a></strong><br />
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</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzalymirrorplan.htm">Plan for mirrored 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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