53 lines
3.0 KiB
HTML
53 lines
3.0 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="Start disk compression" />
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<meta name="DC.Relation" scheme="URI" content="rzalymaintain.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="rzalystartcompression" />
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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>Start disk compression</title>
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</head>
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<body id="rzalystartcompression"><a name="rzalystartcompression"><!-- --></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 disk compression</h1>
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<div><div class="p">Compression increases the apparent capacity of disk units by encoding the
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data to take up less physical storage space. Compression does affect performance
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because of the overhead required to compress and decompress the data. You
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may choose to compress data that you access infrequently or that does not
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require high I/O performance rates. If you want to compress a nonconfigured
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disk unit or a disk unit in an independent disk pool that is unavailable,
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you can do so when your system is fully restarted. For all other disk pools,
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you need to restart your server to the DST mode before compressing them. <div class="note"><span class="notetitle">Note:</span> Disk
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compression is only capable on systems with IOAs released before V5R2.</div>
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</div>
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<div class="p">To start disk compression, follow these steps:<ol><li>Expand <span class="uicontrol">All Disk Units</span>.</li>
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<li>Select the disk units that you want to compress.</li>
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<li>Right-click a selected disk unit and select <span class="uicontrol">Start Compression</span>.</li>
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<li>Follow the instructions on the resulting dialog box to start compression
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on the selected 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="rzalymaintain.htm">Manage disk units</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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