56 lines
2.9 KiB
HTML
56 lines
2.9 KiB
HTML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<!DOCTYPE html
|
|
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|
<html lang="en-us" xml:lang="en-us">
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|
<meta name="security" content="public" />
|
|
<meta name="Robots" content="index,follow" />
|
|
<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))' />
|
|
<meta name="DC.Type" content="topic" />
|
|
<meta name="DC.Title" content="Benefits of device parity protection" />
|
|
<meta name="DC.Relation" scheme="URI" content="rzalydpp.htm" />
|
|
<meta name="copyright" content="(C) Copyright IBM Corporation 2002, 2006" />
|
|
<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2002, 2006" />
|
|
<meta name="DC.Format" content="XHTML" />
|
|
<meta name="DC.Identifier" content="hdrdeviceparityben" />
|
|
<meta name="DC.Language" content="en-us" />
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
|
<!-- US Government Users Restricted Rights -->
|
|
<!-- Use, duplication or disclosure restricted by -->
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
|
<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
|
|
<link rel="stylesheet" type="text/css" href="./ic.css" />
|
|
<title>Benefits of device parity protection</title>
|
|
</head>
|
|
<body id="hdrdeviceparityben"><a name="hdrdeviceparityben"><!-- --></a>
|
|
<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
|
|
<h1 class="topictitle1">Benefits of device parity protection</h1>
|
|
<div><div class="section"><h4 class="sectiontitle">RAID 5</h4></div>
|
|
<ul><li>Lost data is automatically reconstructed by the IOA after a disk failure.</li>
|
|
<li>The system continues to run after a single disk failure.</li>
|
|
<li>A failed disk unit can be replaced without stopping the system.</li>
|
|
<li>Device parity protection reduces the potential number of
|
|
objects that could be damaged when a disk fails.</li>
|
|
<li>Only one disk unit of capacity stores parity data in a parity
|
|
set.</li>
|
|
</ul>
|
|
<div class="section"><h4 class="sectiontitle">RAID 6</h4></div>
|
|
<ul><li>Lost data is automatically reconstructed by the IOA after
|
|
a disk failure.</li>
|
|
<li>The system continues to run after two disks fail.</li>
|
|
<li>Two failed disk units can be replaced without stopping the
|
|
system.</li>
|
|
<li>Device parity protection reduces the potential number of
|
|
objects that could be damaged when a disk fails.</li>
|
|
<li>Two disk units of capacity are dedicated to storing parity
|
|
data in a parity set. </li>
|
|
</ul>
|
|
</div>
|
|
<div>
|
|
<div class="familylinks">
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="rzalydpp.htm">Device parity protection</a></div>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html> |