78 lines
4.5 KiB
HTML
78 lines
4.5 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 additional hardware to achieve the level of protection" />
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<meta name="DC.Relation" scheme="URI" content="rzalymirror4.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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<meta name="DC.Identifier" content="hdrmirror4b" />
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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 additional hardware to achieve the level of protection</title>
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</head>
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<body id="hdrmirror4b"><a name="hdrmirror4b"><!-- --></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 additional hardware to achieve the level of protection</h1>
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<div><p>Consider the following information to ensure adequate protection.</p>
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<ul><li><a href="rzalylopdsk.htm">Disk-unit level protection</a> <p>If you have planned
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for disk-unit level protection, you do not need to do anything more. All mirrored
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disk pools have disk-unit level protection if they meet the requirements for
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starting mirrored protection.</p>
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</li>
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<li><img src="./delta.gif" alt="Start of change" /><a href="rzalyiobuslevelprotection.htm">Input/output bus level protection</a> <p>If
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you have planned for I/O bus level protection, you do not need to do anything
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more. All mirrored disk pools have I/O bus level protection if they meet the
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requirements for starting mirrored protection.</p>
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<img src="./deltaend.gif" alt="End of change" /></li>
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<li><a href="rzalylopctl.htm">Input/output adapter level protection</a> <p>If your planned
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disk units do require an IOA, add as many IOAs as possible, keeping within
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the defined system limits. Then balance the disk units among them according
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to the standard system configuration rules.</p>
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</li>
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<li><a href="rzalylopiop.htm">Input/output processor level protection</a> <p>If you want IOP-level
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protection and do not already have the maximum number of IOPs on your system,
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add as many IOPs as possible, keeping within the defined system limits. Then
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balance the disk units among them according to the standard system configuration
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rules. You might need to add additional buses to attach more IOPs.</p>
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</li>
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<li><a href="rzalylopbus.htm">Bus-level protection</a> <p> If you want bus-level
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protection and already have a multiple-bus system, you do not need to do anything.
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If your system is configured according to standard configuration rules, the
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mirrored pairing function pairs storage units to provide bus-level protection
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for as many mirrored pairs as possible. If you have a single-bus system, you
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can add additional buses as a feature option.</p>
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</li>
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<li><a href="rzalytower.htm">Expansion-unit level protection</a> <p>If your system is
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configured with an equal number of equal capacity disk units between expansion
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units, the mirrored pairing function pairs the disk units in different expansion
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units to provide expansion-unit level protection on as many disk units as
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possible.</p>
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</li>
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<li><a href="rzalyring.htm">Ring-level protection</a> <p>If your system is
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configured with an equal number of equal capacity disk units between high-speed
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links (HSL), the mirrored pairing function pairs the disk units in different
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high-speed link (HSL) configurations to provide ring-level protection on as
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many disk units as possible.</p>
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</li>
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</ul>
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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="rzalymirror4.htm">Determine the hardware that is needed for mirroring</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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