55 lines
3.2 KiB
HTML
55 lines
3.2 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="DC.Type" content="topic" />
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<meta name="DC.Title" content="Plan for storage capacity" />
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<meta name="DC.Relation" scheme="URI" content="rzalymirror2.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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<!-- All rights reserved. Licensed Materials Property of IBM -->
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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 for storage capacity</title>
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</head>
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<body id="hdrplnaspcap"><a name="hdrplnaspcap"><!-- --></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 for storage capacity</h1>
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<div><p>For a new system, your IBM<sup>®</sup> marketing representative can help you analyze your
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system storage requirements. For an existing system, the current amount of
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data in the disk pool that is being planned is a useful starting point. The
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Display Disk Configuration Capacity option of the dedicated service tools
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(DST) or system service tools (SST) shows the total size (in millions of bytes)
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and the percent of storage used for each disk pool on the system. Multiply
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the size of the disk pools by the percent that is used to calculate the number
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of megabytes of data currently in the disk pool. In planning future storage
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requirements for a disk pool, system growth and performance should also be
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considered.</p>
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<p>The planned amount of data and the planned percent of storage used work
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together to determine the amount of actual auxiliary storage needed for a
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mirrored disk pool. For example, if a disk pool is to contain 1 GB (GB equals
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1 073 741 824 bytes) of actual data, it requires 2 GB of storage for the mirrored
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copies of the data. If 50% of storage use is planned for that disk pool, the
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disk pool needs 4 GB of actual storage. If the planned percent of storage
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that is used is 66%, 3 GB of actual storage are required. One gigabyte of
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real data (2 GB of mirrored data) in a 5 GB disk pool results in a 40% auxiliary
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storage utilization.</p>
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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="rzalymirror2.htm">Determine the disk units that are needed</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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