85 lines
6.1 KiB
HTML
85 lines
6.1 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="concept" />
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<meta name="DC.Title" content="Logical partition concept: disk units" />
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<meta name="abstract" content="Disk units store data. The server can use and reuse this data at any time. It is more permanent than memory, but you can still erase it." />
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<meta name="description" content="Disk units store data. The server can use and reuse this data at any time. It is more permanent than memory, but you can still erase it." />
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<meta name="DC.Relation" scheme="URI" content="rzaitconceptconsole.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzaitexpansion.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzaitloadsource.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzaitloadsource.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzaitiodevice.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzaitloadsource.htm" />
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<meta name="DC.Relation" scheme="URI" content="../rzaly/rzalyaspsovrvw.htm" />
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<meta name="DC.Relation" scheme="URI" content="../rzaly/rzalyoverview.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzaitiodevice.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2004, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2004, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rzaitdiskunit" />
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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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<!-- 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>Logical partition concept: disk units</title>
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</head>
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<body id="rzaitdiskunit"><a name="rzaitdiskunit"><!-- --></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">Logical partition concept: disk units</h1>
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<div><p>Disk units store data. The server can use and reuse this data at
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any time. It is more permanent than memory, but you can still erase it.</p>
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<p>You cannot separate the disk units on an IOP into different logical partitions.
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You can create user auxiliary storage pools (ASPs) on any logical partition.
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However, you cannot create a cross-partition ASP. All of the disk units you
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assign to an ASP must be from the same logical partition.</p>
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<p>You can also create an independent auxiliary storage pool (ASP). An independent
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ASP is a collection of disk units that can be taken offline, or made unavailable,
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independent of other disk pools because the data in the independent ASP is
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self-contained. The independent ASP can also be brought online, or made available,
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while the system is active, without having to perform a restart.</p>
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<p>The server maintains the logical partition configuration data on the disk
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unit that you designate as the load source for each logical partition.</p>
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<p>When you move disk units, you may need to clear any logical partition configuration
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data that is contained on them.</p>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="rzaitremovable.htm">Logical partition concept: alternate restart (IPL) devices and removable media device</a></strong><br />
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A removable media device reads and writes to media (tape, CD-ROM, or DVD).</li>
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<li class="ulchildlink"><strong><a href="rzaitconceptconsole.htm">Logical partition concept: console</a></strong><br />
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Each logical partition must have a console attached to it through an IOP.</li>
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<li class="ulchildlink"><strong><a href="rzaitexpansion.htm">Logical partition concept: expansion unit</a></strong><br />
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You can add an expansion unit to many of the iSeries™ servers
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to support additional features and devices.</li>
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<li class="ulchildlink"><strong><a href="rzaitloadsource.htm">Logical partition concept: load source</a></strong><br />
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Each logical partition must have one disk unit designated as the load source.</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaithardwarereq.htm" title="Understand the basic hardware concepts and requirements to partition your server.">Hardware for logical partitions</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="rzaitloadsource.htm" title="Each logical partition must have one disk unit designated as the load source.">Logical partition concept: load source</a></div>
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<div><a href="rzaitiodevice.htm" title="The IOP attaches to the system I/O bus and one or more input/output adapters (IOAs). The IOP processes instructions from the server and works with the IOAs to control the I/O devices.">Logical partition concept: IOP</a></div>
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<div><a href="../rzaly/rzalyaspsovrvw.htm">Disk pools</a></div>
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<div><a href="../rzaly/rzalyoverview.htm">Using independent disk pools</a></div>
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</div>
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<div class="reltasks"><strong>Related tasks</strong><br />
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<div><a href="rzaitrecworknondu.htm" title="When you move disk units among logical partitions or servers, you may need to erase any old configuration data before the server can use the logical partition again.">Clear partition configuration data from nonconfigured 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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