66 lines
4.0 KiB
HTML
66 lines
4.0 KiB
HTML
<?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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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Verify your media" />
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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>Verify your media</title>
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</head>
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<body id="rzaiu192"><a name="rzaiu192"><!-- --></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">Verify your media</h1>
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<div><div class="p"> Good save procedures ensure that you verify that you use the correct media.
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Depending on the size of your installation, you may choose to manually verify
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media, or you may have the server verify the media. <dl><dt class="dlterm">Manual checking</dt>
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<dd>You can use the default of *MOUNTED for the volume (VOL) parameter on
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the save commands. This tells the server to use the currently mounted media.
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It is up to the operator to load the correct media in the correct order.</dd>
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<dt class="dlterm">System checking</dt>
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<dd>You specify a list of volume identifiers on the save or restore commands.
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The server makes sure that the operator loads the correct media volumes in
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the order specified on the command. If an error occurs, the server sends
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a message to the operator that requests the correct media volume. The operator
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can either load another media or override the request.</dd>
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</dl>
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</div>
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<p>Expiration dates on the media files are another method that you can use
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to verify that you use the correct media. If you rely on your operators to
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verify the media, you might specify an expiration date (EXPDATE) of *PERM
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(permanent) for your save operations. This prevents someone from writing
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over a file on the media unintentionally. When you are ready to use the same
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media again, specify CLEAR(*ALL) or CLEAR(*REPLACE) for the save operation.
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CLEAR(*REPLACE) automatically replaces active data on the media.</p>
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<p>If you want the server to verify your media, specify an expiration date
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(EXPDATE) that ensures that you do not use the media again too soon. For
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example, if you rotate five sets of media for daily saves, specify an expiration
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date of the current day plus 4 on the save operation. Specify CLEAR(*NONE)
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on save operations so the server does not write over unexpired files.</p>
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<p>Avoid situations where the operator must regularly respond to (and ignore)
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messages such as <span class="q">"Unexpired files on the media"</span>. If operators get in
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the habit of ignoring routine messages, they might miss important messages.</p>
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<div class="section"></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>
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</body>
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</html> |