66 lines
3.7 KiB
HTML
66 lines
3.7 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="concept" />
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<meta name="DC.Title" content="Tape device files" />
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<meta name="abstract" content="Understand how a tape device file works." />
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<meta name="description" content="Understand how a tape device file works." />
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<meta name="DC.Relation" scheme="URI" content="concept.htm" />
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<meta name="DC.Relation" scheme="URI" content="../cl/ovrtapf.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="tapacc" />
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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>Tape device files</title>
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</head>
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<body id="tapacc"><a name="tapacc"><!-- --></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">Tape device files</h1>
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<div><p>Understand how a tape device file works.</p>
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<p>A tape device file allows access to data files on tape media. The device
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file contains a description of the format of the data, and a list of attributes
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that describe how the server should process the tape data file.</p>
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<p>It is not necessary to have a separate device file for each tape device.
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Your application program can use a single device file for several different
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tape devices through the use of an Override Tape File (OVRTAPF) command. You
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can associate any number of device files with one device.</p>
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<div class="note"><span class="notetitle">Note:</span> You must vary on the configuration descriptions before
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using them. See the <cite>Local Device Configuration, <span>SC41-5121-00</span></cite> book
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for information about varying on configuration descriptions.</div>
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<div class="section"><h4 class="sectiontitle">IBM-supplied tape device files</h4><p>You can use the following
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tape device files that are shipped with the operating system: </p>
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<ul><li>QTAPE (tape file)</li>
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<li>QTAPSRC (tape source file)</li>
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</ul>
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<p>These files are all program-described as data files in library QGPL.
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The record format names are the same as the file names. The files contain
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default values for most parameters.</p>
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<p>You can create additional tape device
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files to fit your needs. For example, you can create an additional tape device
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file to contain the specific volume and label information for a tape data
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file that several programs can use.</p>
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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="concept.htm" title="Find out how tape files operate on your server.">Concepts</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="../cl/ovrtapf.htm">Override Tape File (OVRTAPF) command</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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