50 lines
2.9 KiB
HTML
50 lines
2.9 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="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="Input/output bus level protection" />
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<meta name="DC.Relation" scheme="URI" content="rzalymirror3.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="iobuslevelprotection" />
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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>Input/output bus level protection</title>
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</head>
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<body id="iobuslevelprotection"><a name="iobuslevelprotection"><!-- --></a>
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<img src="./delta.gif" alt="Start of change" /><!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Input/output bus level protection</h1>
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<div><div class="fignone"><p>Determine whether you want I/O bus level protection based on the following: </p>
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<ul><li>To keep your system available when an I/O bus fails.</li>
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<li>To concurrently repair a failed disk unit.</li>
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</ul>
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<p>To achieve I/O bus protection, all disk units must have a mirrored unit
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attached to a different I/O bus. This figure shows I/O bus protection.
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The two storage units make a mirrored pair. With I/O bus protection, the system
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can continue to operate if one I/O bus fails. If the IOA or the IOP fails,
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the system cannot access data on either of the disk units, and the system
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is unusable.</p>
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<br /><img src="rzaix526.gif" alt="Figure showing the elements of I/O bus level protection" /><br /><p>This figure shows the elements of I/O bus protection: one bus, connected
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to one I/O processor, connected to one IOA, with two or more I/O buses, each
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attached to a separate disk unit. </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="rzalymirror3.htm">Determine the level of protection that you want</a></div>
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</div>
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</div>
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<img src="./deltaend.gif" alt="End of change" /></body>
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</html>
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