55 lines
1.7 KiB
PHP
55 lines
1.7 KiB
PHP
<?php
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# dvdisaster: English homepage translation
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# Copyright (C) 2004-2009 Carsten Gnörlich
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#
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# UTF-8 trigger: äöüß
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#
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# Include our PHP sub routines, then call begin_page()
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# to start the HTML page, insert the header,
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# navigation and news if appropriate.
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require("../include/dvdisaster.php");
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begin_page();
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?>
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<!--- Insert actual page content below --->
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<h3>dvdisaster as a complement to quality scans</h3>
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<a href="qa.php#pipo">Quality scans</a>, e.g. C2 error or PI/PO scans are a valuable
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tool for testing the results of the media writing process.<p>
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But quality scans are <b>not</b> a reliable means of <b>predicting
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the lifetime</b> of optical media. <br>
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Consider we are looking for the right time
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to copy a worn-out medium onto a new one:
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<ul>
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<li>Too early: Copying media because of a bad quality scan is cost-ineffective.
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Sometimes such media remain readable much longer than expected.<p></li>
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<li>Too late: When the quality scan reveals unreadable sectors some
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data has already been lost.<p></li>
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<li>Right before the medium fails: The ideal case, but how to tell?
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</ul>
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However, we could do it the dvdisaster way:
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<ul>
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<li><a href="howtos20.php">Create error correction data</a> for the medium.<p></li>
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<li><a href="howtos10.php">Scan the medium</a> regularly. Use it until the first read errors occur.<p></li>
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<li><a href="howtos40.php">Recover</a> the read errors <a href="howtos40.php">using the error correction data</a>.
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Write the recovered image to a new medium.</li>
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</ul>
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<p>
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<a href="index30.php">Pro and con of dvdisaster at a glance...</a>
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<!--- do not change below --->
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<?php
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# end_page() adds the footer line and closes the HTML properly.
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end_page();
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?>
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