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<h1 class="topictitle1">Convert directories from *TYPE1 to *TYPE2</h1>
<div><p><span>The "root" (/), QOpenSys, and user-defined
file systems (UDFS) in the integrated file system support the *TYPE2 directory
format as of OS/400<sup>®</sup> V5R1.</span></p>
<div class="section"><p>The *TYPE2 directory format is an enhancement of the original
*TYPE1 directory format. *TYPE2 directories have a different internal structure
from *TYPE1 directories and provide improved performance and reliability.</p>
</div>
<div class="section"><p>Shortly after <span class="keyword">i5/OS™</span> V5R3M0
or a later release is installed, the conversion to *TYPE2 directories automatically
begins for any of the file systems that have not yet been converted to support
*TYPE2 directories. This conversion should not significantly impact your system
activity.</p>
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<li class="ulchildlink"><strong><a href="rzaaxconvertoverview.htm">Overview of *TYPE1 to *TYPE2 conversion</a></strong><br />
<span>The "root" (/), QOpenSys, and user-defined
file systems (UDFS) in the integrated file system support the *TYPE2 directory
format as of OS/400 V5R1.</span></li>
<li class="ulchildlink"><strong><a href="rzaaxconcon.htm">Conversion considerations</a></strong><br />
<span>Here are several things
to consider during the conversion process.</span></li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaaxkickoff.htm" title="The integrated file system is a part of i5/OS that lets you support stream input/output and storage management similar to personal computer and UNIX operating systems, while providing you with an integrating structure over all information stored in the server.">Integrated file system</a></div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
<div><a href="rzaaxtype2.htm" title="The &#34;root&#34; (/), QOpenSys, and user-defined file systems (UDFS) in the integrated file system support the *TYPE2 directory format. The *TYPE2 directory format is an enhancement of the original *TYPE1 directory format.">*TYPE2 directories</a></div>
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