57 lines
3.2 KiB
HTML
57 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="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="Read considerations" />
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<meta name="abstract" content="Use this information to learn the read considerations when working with tape." />
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<meta name="description" content="Use this information to learn the read considerations when working with tape." />
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<meta name="DC.Relation" scheme="URI" content="inoutpro.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="rcon" />
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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>Read considerations</title>
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</head>
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<body id="rcon"><a name="rcon"><!-- --></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">Read considerations</h1>
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<div><p>Use this information to learn the read considerations when working
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with tape.</p>
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<ul><li>If the system does not find an end-of-file label, processing will continue
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until the system uses all the specified volume
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identifiers. If the program specifies VOL(*NONE), then the system processes
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the tapes until reaching the specified number of reels (REELS parameter).
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The system sends a message CPA5230 to the system operator message queue when
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all the identifiers in the VOL list are processed. When you receive this
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message, you have the following options: <ul><li>Cancel processing of the device file immediately. The system will close
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the device file.</li>
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<li>Continue, in order to process other volumes.</li>
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</ul>
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</li>
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<li>When the system reads a tape block that is not a valid length, the system
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sends a CPF5036 notify message. If your high-level language reports this condition
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to your program, it can continue to process by reading another record. When
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you continue this way, the system skips the block that is not valid so your
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program does not receive any records from this block.</li>
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</ul>
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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="inoutpro.htm" title="Learn the basics for I/O procedures on tape.">Input/output processing for tape</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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