80 lines
4.4 KiB
HTML
80 lines
4.4 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 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="Troubleshoot tape files" />
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<meta name="abstract" content="This information is designed to help you solve problems related to tape files that you might be experiencing." />
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<meta name="description" content="This information is designed to help you solve problems related to tape files that you might be experiencing." />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2004, 2006" />
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<meta name="DC.Identifier" content="troubletf" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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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>Troubleshoot tape files</title>
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</head>
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<body id="troubletf"><a name="troubletf"><!-- --></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">Troubleshoot tape files</h1>
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<div><p><span>This information is designed to help you
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solve problems related to tape files that you might be experiencing.</span></p>
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<div class="section"><h4 class="sectiontitle">Handling tape processing errors and damaged
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tapes</h4><p>Use this topic to determine what might be damaging your tapes
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or causing your tape processing errors.</p>
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<p>When
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the system does not write tape marks or labels at the end of the data file,
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damage to the data files can occur. This can happen due to an error condition
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or a system failure. If this happens when writing a file to a 1/2-inch tape
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device, the following situation occurs when you try to read the data file:</p>
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<ul><li>The new data and existing data might appear concatenated
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when processed for input. When the tape has labels, the system sends an error
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message to the system operator when the program reads the trailer labels.
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The system does not detect an error for unlabeled tape.</li>
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<li>If the new data and the existing data do not appear concatenated, then
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the system sends an error message to the system operator.</li>
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<li> If the tape you use as input meets one of the following conditions, then
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the tape advances off the end of the reel: <ul><li>The tape does not contain existing data or tape marks beyond the location
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of the last data block.</li>
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<li>The tape is new.</li>
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<li>The tape is completely erased.</li>
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</ul>
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</li>
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</ul>
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<div class="note"><span class="notetitle">Note:</span> Whenever you close an output file: <ul><li>The system attempts to write an end-of-tape marker and label at the end
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of the file.</li>
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<li>If the system cannot write closing tape marks and labels, the system sends
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a message to your job log.</li>
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</ul>
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</div>
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<p>When an error occurs when you save data by using a SAVxxx
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command, the system prompts the operator to load another tape or cancel the
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job. If the operator loads another tape volume:</p>
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<ul><li>The system repositions the tape a number of blocks before the error occurred.</li>
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<li>The system writes end-of-volume labels.</li>
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</ul>
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<p>The job then continues to write data starting with the first block
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of data that was overwritten with end-of-volume labels.</p>
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<p>If damage occurs
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while using a cartridge tape device and you encounter a blank tape, the program sends an error message
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to the system operator.</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="rzatbkickoff.htm" title="Tape files are used for storing data.">Tape files</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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