71 lines
2.7 KiB
PHP
71 lines
2.7 KiB
PHP
<?php
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# dvdisaster: English homepage translation
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# Copyright (C) 2004-2012 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 class="top">Hints for storing the error correction files</h3>
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Currently there are few exchangeable media technologies
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which can be a cost-effective alternative to the various CD/DVD/BD formats.
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So you will probably not only use CD/DVD/BD for data archival, but store
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the respective error correction files on CD, DVD or BD as well.<p>
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There is nothing wrong with that, but bear in mind that your archived data
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and the error correction files are stored on media with the same degree of
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reliability. When read errors occur on the archived data, be prepared that
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the disc with the respective error correction file might have aged beyond
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full readability, too.<p>
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Therefore it is important to protect your error correction files with the same
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care as your other data<sup><a href="#footnote1">*)</a></sup>.
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This is best achieved by integrating the error correction
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files into your normal data backup scheme. Here are two ideas:<p>
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<b>1. Storing the error correction files on dedicated media:</b><p>
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If you decide to store error correction files on separate media, it is
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<a href="qa32.php#eccfile">important</a> to protect those media
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with dvdisaster as well. To avoid a never-ending chain
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(error correction files for media of error correction files for ...),
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try the following:<p>
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Lets assume that five error correction files can be stored at each medium.
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Write the first five error correction files to the first medium and create
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another error correction file for that medium. Now save that error correction
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file together with four other error correction files on the second medium.
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If you continue that way, all error correction files except for those from the
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last medium (which may still be kept on hard disc) are protected by dvdisaster.<p>
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<b>2. Putting the error correction file on the next medium of a series:</b><p>
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If you do not fill your media to the max (e.g. with less than 4GB for a single layered DVD), you can store the error correction file of one medium
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on the succeeding medium within a series.<p>
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<pre> </pre>
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<table width="50%"><tr><td><hr></td></tr></table>
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<span class="fs">
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<a name="footnote1"><sup>*)</sup></a>
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You might also choose an <a href="howtos30.php">augmented image</a> using RS02
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or RS03 instead of creating an error correction file.
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</span>
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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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