85 lines
5.9 KiB
HTML
85 lines
5.9 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="Volume type *BACKUP" />
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<meta name="abstract" content="This topic discusses the *BACKUP volume type and the unique backup process that are associated with a *BACKUP volume." />
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<meta name="description" content="This topic discusses the *BACKUP volume type and the unique backup process that are associated with a *BACKUP volume." />
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<title>Volume type *BACKUP</title>
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</head>
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<body id="rzam4voltypbckup"><a name="rzam4voltypbckup"><!-- --></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">Volume type *BACKUP</h1>
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<div><p>This topic discusses the *BACKUP volume type and the unique backup
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process that are associated with a *BACKUP volume. </p>
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<p>Using Copy Optical (CPYOPT) to a *BACKUP volume is no longer the suggested
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way of backing up your volumes because of the time required. Duplicate Optical
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(DUPOPT) is the recommended way of backing up your volumes. </p>
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<p>The *BACKUP volume type supports the backing up and protection of information
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from optical *PRIMARY volumes. The system does not allow user programs or
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APIs to write to optical *BACKUP volumes. Only a limited set of optical commands
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can update *BACKUP volumes. Once the system creates a directory or file on
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an optical *BACKUP volume, the only way to delete them is to reinitialize
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the volume. Doing this prevents either accidental or intentional deletion. </p>
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<p>Backup volumes and directories contain a Complete Backup Range file which
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contains date information about prior copy requests to the optical *BACKUP
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volume. These dates are helpful in determining the contents of backup directories
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and volumes with respect to the contents of their primary counterparts. These
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control dates make it easier to recover by providing a time checkpoint. Each
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backup directory has its own control dates. Each backup volume also has its
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own control dates, which include:</p>
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<ul><li>Complete starting date and time</li>
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<li>Complete ending date and time</li>
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<li>Last changed date and time</li>
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</ul>
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<p>The system writes these dates to the backup volumes in a reserved file
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within each backup directory. Since the system writes the dates to the media,
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the backup volumes are self-contained. Not only is the backup data on the
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media, but the recovery information is there as well.</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="rzam4compbckuprnge.htm">Complete backup range</a></strong><br />
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This topic discusses the different types of complete backup ranges.</li>
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<li class="ulchildlink"><strong><a href="rzam4compbckupstrdt.htm">Complete backup range – start date and time</a></strong><br />
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The starting date and time of a Complete Backup Range for an optical backup volume or directory is the earliest time that is specified on a CPYOPT command when all eligible files on the volume or directory were successfully copied.</li>
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<li class="ulchildlink"><strong><a href="rzam4compbckuprngenddt.htm">Complete backup range – end date and time</a></strong><br />
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The CPYOPT command does not allow you to specify an ending date and time.</li>
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<li class="ulchildlink"><strong><a href="rzam4compbckuplastdt.htm">Complete backup range – last changed date and time</a></strong><br />
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Using the CPYOPT command causes the system to write the last changed date and time of an optical backup volume or directory.</li>
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<li class="ulchildlink"><strong><a href="rzam4explcpybckupvol.htm">Example: Copy to optical *BACKUP volume</a></strong><br />
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This example shows the system that backs up the *PRIMARY volume VOL01 to the *BACKUP volume BKP-VOL01.</li>
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<li class="ulchildlink"><strong><a href="rzam4convoptbckupvol.htm">Convert an optical *BACKUP volume</a></strong><br />
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Use the Convert Optical Backup (CVTOPTBKU) command to convert an optical *BACKUP volume to an optical *PRIMARY volume.</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="rzam4cpyopt.htm" title="This topic discusses the Copy Optical (CPYOPT) CL command and some of the optional parameters which you can specify.">Copy optical (CPYOPT)</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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