68 lines
3.9 KiB
HTML
68 lines
3.9 KiB
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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<meta name="DC.Title" content="Handle tape media errors" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Handle tape media errors</title>
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</head>
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<body id="rzaiu165"><a name="rzaiu165"><!-- --></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">Handle tape media errors</h1>
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<div><div class="section"><div class="p">When reading from or writing to tape, it is normal for some errors
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to occur. Three types of tape errors can occur during save and restore operations:
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<dl><dt class="dlterm">Recoverable errors</dt>
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<dd>Some media devices support recovering from media errors. The server repositions
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the tape automatically and tries the operation again.</dd>
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<dt class="dlterm">Unrecoverable errors–processing can continue</dt>
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<dd>In some cases, the server cannot continue to use the current tape, but
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can continue processing on a new tape. The server requests you to load another
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tape. The tape with the irrecoverable error can be used for restore operations.</dd>
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<dt class="dlterm">Unrecoverable errors–processing cannot continue</dt>
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<dd>In some cases, an irrecoverable media error causes the server to stop
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the save process. How to recover from a media error during a SAVLIB operation
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describes what to do when this type of error occurs.</dd>
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</dl>
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</div>
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</div>
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<div class="section"><p>Tapes physically wear out after extended use. You can determine
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if a tape is wearing out by periodically printing the error log. Use the
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Print Error Log (PRTERRLOG) command and specify TYPE(*VOLSTAT). The printed
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output provides statistics about each tape volume. If you use unique names
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(volume identifiers) for your tapes, you can determine which tapes have excessive
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read or write errors. You should remove these bad tapes from your media library.</p>
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</div>
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<div class="section"><p>If you suspect that you have a bad tape, use the Display Tape
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(DSPTAP) or the Duplicate Tape (DUPTAP) command to check the integrity of
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the tape. These commands read the entire tape and detect objects on the tape
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that the server cannot read.</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="rzaiurzaiu103.htm" title="Use this information to select and manage the save media that you will use for all your save functions.">Prepare your media to save your server</a></div>
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</div>
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<div class="reltasks"><strong>Related tasks</strong><br />
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<div><a href="rzaiurzaiu120.htm">How to recover from a media error during a SAVLIB operation</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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