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documentation/en/qa37.php

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+<?php
+# dvdisaster: English homepage translation
+# Copyright (C) 2004-2012 Carsten Gnörlich
+#
+# UTF-8 trigger: äöüß 
+#
+# Include our PHP sub routines, then call begin_page()
+# to start the HTML page, insert the header, 
+# navigation and news if appropriate.
+
+require("../include/dvdisaster.php");
+begin_page();
+?>
+
+<!-- Insert actual page content below -->
+
+<h3 class="top">Hints for storing the error correction files</h3>
+
+Currently there are few exchangeable media technologies
+which can be a cost-effective alternative to the various CD/DVD/BD formats.
+So you will probably not only use CD/DVD/BD for data archival, but store
+the respective error correction files on CD, DVD or BD as well.<p>
+
+There is nothing wrong with that, but bear in mind that your archived data
+and the error correction files are stored on media with the same degree of
+reliability. When read errors occur on the archived data, be prepared that
+the disc with the respective error correction file might have aged beyond
+full readability, too.<p>
+
+Therefore it is important to protect your error correction files with the same
+care as your other data<sup><a href="#footnote1">*)</a></sup>. 
+This is best achieved by integrating the error correction
+files into your normal data backup scheme. Here are two ideas:<p>
+
+<b>1. Storing the error correction files on dedicated media:</b><p>
+
+If you decide to store error correction files on separate media, it is
+<a href="qa32.php#eccfile">important</a> to protect those media
+with dvdisaster as well. To avoid a never-ending chain
+(error correction files for media of error correction files for ...),
+try the following:<p>
+
+Lets assume that five error correction files can be stored at each medium.
+Write the first five error correction files to the first medium and create
+another error correction file for that medium. Now save that error correction
+file together with four other error correction files on the second medium.
+If you continue that way, all error correction files except for those from the
+last medium (which may still be kept on hard disc) are protected by dvdisaster.<p>
+
+<b>2. Putting the error correction file on the next medium of a series:</b><p>
+
+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
+on the succeeding medium within a series.<p>
+
+<pre> </pre>
+<table width="50%"><tr><td><hr></td></tr></table>
+
+<span class="fs">
+<a name="footnote1"><sup>*)</sup></a> 
+You might also choose an <a href="howtos30.php">augmented image</a> using RS02
+or RS03 instead of creating an error correction file.
+</span>
+
+<!-- do not change below -->
+
+<?php
+# end_page() adds the footer line and closes the HTML properly.
+
+end_page();
+?>