77 lines
5.4 KiB
HTML
77 lines
5.4 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 name="DC.Title" content="Path names in an integrated file system user-defined file system" />
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<meta name="abstract" content="A block special file (*BLKSF) represents a user-defined file system (UDFS) when the entire UDFS and all of the objects within it need to be manipulated." />
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<meta name="description" content="A block special file (*BLKSF) represents a user-defined file system (UDFS) when the entire UDFS and all of the objects within it need to be manipulated." />
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<meta name="DC.Relation" scheme="URI" content="rzaaxunicode.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzaaxtype2.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzaaxpath.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1999, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1999, 2006" />
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<title>Path names in an integrated file system user-defined file system</title>
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</head>
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<body id="rzaaxudfspath"><a name="rzaaxudfspath"><!-- --></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">Path names in an integrated file system user-defined file system</h1>
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<div><p><span>A block special file (*BLKSF) represents
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a user-defined file system (UDFS) when the entire UDFS and all of the objects
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within it need to be manipulated.</span></p>
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<div class="section"><div class="p"> If your UDFS resides on the system or on a basic user ASP, block
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special file names must be of the form <pre>/dev/QASPXX/udfs_name.udfs</pre>
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where <samp class="codeph">XX</samp>
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is the ASP number where you store the UDFS, and <samp class="codeph">udfs_name</samp>
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is the unique name of the UDFS within that ASP. Note that the UDFS name must
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end with the <samp class="codeph">.udfs</samp> extension.</div>
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</div>
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<div class="section"><div class="p">If your UDFS resides on an independent ASP, block special file
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names must be of the form <pre>/dev/asp_name/udfs_name.udfs</pre>
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where <samp class="codeph">asp_name</samp> is
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the name of independent ASP where you store the UDFS and <samp class="codeph">udfs_name</samp>
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is the unique name of the UDFS within that independent ASP. Note that the
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UDFS name must end with the <samp class="codeph">.udfs</samp> extension.</div>
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</div>
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<div class="section"><p>Path names for objects within a UDFS are relative to the directory
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over which you mount a UDFS. For example, if you mount the UDFS <samp class="codeph">/dev/qasp01/wysocki.udfs</samp> over <samp class="codeph">/home/dennis</samp>,
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then the path names for all objects within the UDFS will begin with <samp class="codeph">/home/dennis</samp>.</p>
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</div>
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<div class="section"><p>Additional path name rules:</p>
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</div>
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<div class="section"> <ul><li>Each component of the path name can be up to 255 characters long. The
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full path name can be up to 16 MB long.</li>
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<li>There is no limit to the depth of the directory hierarchy other than program
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and server space limits.</li>
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<li>The characters in names are converted to UCS2 Level 1 form (for *TYPE1
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directories) and UTF-16 (for *TYPE2 directories) when the names are stored.</li>
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</ul>
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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="rzaaxudfsfs.htm" title="The user-defined file systems (UDFSs) reside on the auxiliary storage pool (ASP) or independent auxiliary storage pool (ASP) of your choice. You create and manage these file systems.">User-defined file systems (UDFSs)</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="rzaaxunicode.htm" title="When you use the root (/), QOpenSys, and user-defined file systems, you can take advantage of system support that ensures characters in object names remain the same.">Name continuity</a></div>
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<div><a href="rzaaxtype2.htm" title="The "root" (/), 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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<div><a href="rzaaxpath.htm" title="A path name (also called a pathname on some systems) tells the server how to locate an object.">Path name</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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