95 lines
5.5 KiB
HTML
95 lines
5.5 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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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Duplicate Optical (DUPOPT)" />
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<meta name="abstract" content="The Duplicate Optical (DUPOPT) command creates a duplicate optical volume." />
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<meta name="description" content="The Duplicate Optical (DUPOPT) command creates a duplicate optical volume." />
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<meta name="DC.Relation" scheme="URI" content="rzam4optvolbackup.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2004, 2006" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Duplicate Optical (DUPOPT)</title>
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</head>
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<body id="rzam4dupopt"><a name="rzam4dupopt"><!-- --></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">Duplicate Optical (DUPOPT)</h1>
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<div><p>The Duplicate Optical (DUPOPT) command creates a duplicate optical
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volume. </p>
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<p>The created duplicate volume is identical to the original volume except
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for the volume identifier and the time created. </p>
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<p>Performance improves significantly when you use DUPOPT instead of CPYOPT
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to back up an entire volume from scratch. The DUPOPT command has the following
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requirements: </p>
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<ul><li>Two optical drives are required. </li>
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<li>The source and target volumes must have the same sector size.</li>
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<li>The source and target volumes can not be on opposite sides of the same
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cartridge.</li>
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<li>The source and target device types must be the same type (for example,
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optical library to optical library or optical stand-alone device to optical
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stand-alone device).</li>
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<li>If the source media type is *WORM, the target media type can be either
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*WORM or *ERASE. v If the source media type is *ERASE, the target media type
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must be *ERASE.</li>
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<li>If the source media type is *DVD-RAM, the target media type must be *DVD-RAM.</li>
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<li>If the target media type is *WORM, it must be uninitialized.</li>
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<li>If the target media type is *ERASE, all data currently on the target volume
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will be lost.</li>
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<li>Once the DUPOPT command begins operation, the system will not interrupt
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the process. The system will not schedule any other work in the drives until
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the command completes.</li>
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</ul>
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<p>Use the DUPOPT command when you want to copy the entire volume or for incremental
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backups of your source volume. For an entire backup, wait until your source
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volume is full before you use the DUPOPT CL command. </p>
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<p>DUPOPT always makes a complete copy of your source volume. However, you
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could use it to make incremental backups of your optical volumes in the following
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manner:</p>
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<ol><li>Determine how often you wish to backup your source and how many backup
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copies you wish to keep.</li>
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<li>Use DUPOPT to duplicate your source media to a target media that has a
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media type of *ERASE. This will give you an exact copy of the source media.</li>
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<li>Continue making duplicates of your source volume as often as you wish
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until your source volume becomes full.</li>
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<li>Once the source media is full and you have a successful final copy, you
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can reuse all previous target media for backups of other source media.</li>
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<li>If your source media type is *WORM, prior to your final backup determine
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whether or not your final target media type needs to be media type *WORM or
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*ERASE.</li>
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</ol>
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<p><strong>Caution: </strong>If the DUPOPT command does not complete successfully or
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it ends for any reason while processing, the backup is unsuccessful. In addition,
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if the target media type is *WORM, the target volume may no longer be usable.</p>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="rzam4enhancements.htm">Enhancements</a></strong><br />
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</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzam4optvolbackup.htm" title="This concept describes the methods that you can use to back up optical data from one optical volume to another optical volume or tape.">Optical Volume Backup</a></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="rzam4perfconscpydup.htm" title="There are several performance considerations to be aware of when copying and duplication optical volumes.">Performance consideration for copying and duplicating optical volumes</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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