170 lines
7.3 KiB
HTML
170 lines
7.3 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>Hints for storing the error correction files</title>
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<link rel="stylesheet" type="text/css" href="../include/dvdisaster.css">
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</head>
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<body>
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<!-- Title header -->
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<table width="100%" cellpadding="0" border="0">
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<tr>
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<td align="left">
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<span class="fxxl"><b>dvdisaster</b></span>
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<i>Version 0.72.4 / 0.72 (pl4)</i>
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</td>
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<td align="right">
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<span class="fxxl"> </span><a href="http://dvdisaster.net/en/">To the Internet version</a>
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<a href="../cs/qa37.html"></a>
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<a href="../de/qa37.html"></a>
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<a href="../ru/qa37.html"></a>
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</td>
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</tr>
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</table>
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<table width="100%" cellpadding="0" border="0">
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<tr>
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<td colspan="2" class="hsep"></td>
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</tr>
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<tr><td colspan="2" style="height: 10px">
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</td></tr>
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</table>
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<table width="100%" cellspacing=0>
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<tr>
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<!-- Navigation -->
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<td style="background-color:#f0f0f0; vertical-align:top; width:20%;">
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<table width="100%" cellpadding="10">
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<tr>
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<td>
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<span class="fs"><b>Contents</b></span>
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<table width="100%" cellpadding="0" cellspacing="0">
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<tr>
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<td class="hsep"></td>
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</tr>
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</table><p>
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<table width="100%">
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<tr><td colspan=3><span class="fs"><a href="news.html">News</a></span></td></tr>
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<tr><td></td><td></td><td style="height:10px;"></td></tr>
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<tr><td colspan=3><span class="fs"><a href="index.html">Overview</a></span></td></tr>
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<tr><td></td><td></td><td style="height:10px;"></td></tr>
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<tr><td colspan=3><span class="fs"><a href="howtos.html">Howtos</a></span></td></tr>
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<tr><td></td><td></td><td style="height:10px;"></td></tr>
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<tr><td colspan=3><span class="fs"><a href="download.html">Download</a></span></td></tr>
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<tr><td></td><td></td><td style="height:10px;"></td></tr>
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<tr><td colspan=3><span class="fs"><a href="qa.html">Questions and Answers</a></span></td></tr>
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<tr><td style="width:1%; vertical-align:top;">·</td><td colspan=2><span class="fs"><a href="qa10.html">Technical Questions</a></span></td></tr>
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<tr><td style="width:1%; vertical-align:top;">·</td><td colspan=2><span class="fs"><a href="qa20.html">Error messages</a></span></td></tr>
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<tr><td style="width:1%; vertical-align:top;">·</td><td colspan=2><span class="fs"><a href="qa30.html">Background information</a></span></td></tr>
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<tr><td></td><td style="vertical-align:top; font-size:small;">-</td><td><span class="fs"><a href="qa31.html">Error correction properties</a></span></td></tr>
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<tr><td></td><td style="vertical-align:top; font-size:small;">-</td><td><span class="fs"><a href="qa32.html">Image level data recovery</a></span></td></tr>
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<tr><td></td><td style="vertical-align:top; font-size:small;">-</td><td><span class="fs"><a href="qa33.html">RS01, RS02 and RS03</a></span></td></tr>
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<tr><td></td><td style="vertical-align:top; font-size:small;">-</td><td><span class="fs"><a href="qa34.html">Linear reading strategy</a></span></td></tr>
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<tr><td></td><td style="vertical-align:top; font-size:small;">-</td><td><span class="fs"><a href="qa35.html">Adaptive reading strategy</a></span></td></tr>
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<tr><td></td><td style="vertical-align:top; font-size:small;">-</td><td><span class="fs"><a href="qa36.html">Remarks on read errors</a></span></td></tr>
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<tr><td></td><td style="vertical-align:top; font-size:small;">-</td><td><span class="fs">Hints for storing the error correction files</span></td></tr>
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<tr><td></td><td></td><td style="height:10px;"></td></tr>
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<tr><td colspan=3><span class="fs"><a href="feedback.html">Bug reporting</a></span></td></tr>
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</table>
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</td>
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</tr>
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</table>
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</td>
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<td></td>
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<!-- Actual page contents -->
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<td style="vertical-align:top; width:77%;" rowspan="2">
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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="qa37.html#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.html#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.html">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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</td> <!-- end of page contents -->
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</tr>
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<tr><td colspan="2" class="hsep"></td>
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<tr>
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<td align="center">
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<span class="fs">
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<i> Copyright 2004-2012 Carsten Gnörlich.<br>
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Verbatim copying and distribution of this entire article is permitted in any medium, provided this notice is preserved.
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</i>
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</span>
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</td>
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</tr>
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<tr><td colspan="2" class="hsep"></td>
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</table>
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</body>
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</html>
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