67 lines
4.3 KiB
HTML
67 lines
4.3 KiB
HTML
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<meta name="DC.Title" content="Suggestions on which CPYOPT volume type to use" />
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<meta name="abstract" content="Below is a list of items that you can use to determine if you should use a target volume type of *PRIMARY or *BACKUP." />
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<meta name="description" content="Below is a list of items that you can use to determine if you should use a target volume type of *PRIMARY or *BACKUP." />
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<title>Suggestions on which CPYOPT volume type to use</title>
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<body id="rzam4suggscpyoptvols"><a name="rzam4suggscpyoptvols"><!-- --></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">Suggestions on which CPYOPT volume type to use</h1>
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<div><p>Below is a list of items that you can use to determine if you should
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use a target volume type of *PRIMARY or *BACKUP. </p>
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<ul><li>In general, the CPYOPT to a type *PRIMARY volume gives you more flexibility,
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but it requires more management of your backup volumes.</li>
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<li>The CPYOPT to a type *BACKUP volume provides more management and security
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for your optical backup volumes, but it is less flexible.</li>
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<li>Use the CPYOPT command, and specify a type *PRIMARY volume, if you want
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to copy data from several volumes to a single volume.</li>
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<li>Use the CPYOPT command, and specify a type *BACKUP volume, if you want
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better security for your backup volumes. The system cannot write volumes with
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type *BACKUP to with normal optical commands or user programs.</li>
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<li>Use the CPYOPT command and specify a type *BACKUP volume to save information
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such as when the system copied directories and volumes, and the success status
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of those copies.</li>
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<li>The biggest advantage of using the CPYOPT to a type *BACKUP volume is
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that the system stores the backup control information on the backup volume.
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This information includes the relationship between files on the backup volume
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and the files on the primary volume. This information can be very useful if
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you ever need to recover the lost source data is from the backup volume.</li>
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<li>Use the CPYOPT command, and specify a type *BACKUP volume, if you want
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the source and target file dates (creation and change) to be identical.</li>
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<li>One disadvantage in using the CPYOPT command to a type *BACKUP volume
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is that the system uses extra space on the backup volume to store control
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information. The amount that is used is approximately 3 times the sector size
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for each directory. Therefore, if CPYOPT copies 100 directories from a primary
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volume to a backup volume where the sector size on the backup volume is 2KB,
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the backup volume uses an additional 600KB of space. In this example 600KB
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of space is used every time the command is run.</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="rzam4usecpyopbckupvol.htm" title="You can use the Copy Optical (CPYOPT) command to do a complete or partial copy of your volume.">Use CPYOPT to backup a volume</a></div>
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</div>
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</div>
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</body>
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