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documentation/en/howtos63.php

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+<?php
+# dvdisaster: English homepage translation
+# Copyright (C) 2004-2009 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>Using dvdisaster the wrong way</h3>
+
+Joe bets on his media keeping their content
+without additional protection.<p>
+
+<table width="100%">
+<tr>
+<td width="15%">10. Feb. 2004</td>
+<td width="60px"><img src="../images/good-cd.png"></td>
+<td width="60px"><img src="../images/good-cd.png"></td>
+<td>Joe creates two CDs containing important data. But he does not
+make any provisions against data loss on those media.</td>
+</tr>
+<tr><td colspan="4"> <hr> </td></tr>
+<tr>
+<td>14. May 2005</td>
+<td><img align="top" src="../images/good-cd.png"></td>
+<td><img align="top" src="../images/good-cd.png"></td>
+<td>Joe uses his CDs regularly. After one year they are still perfectly 
+readable.</td>
+</tr>
+<tr><td colspan="4"> <hr> </td></tr>
+<tr>
+<td>19. Aug 2007</td>
+<td><img align="top" src="../images/bad-cd.png"></td>
+<td><img align="top" src="../images/good-cd.png"></td>
+<td>After two more years Joe notices that some data on one CD is no
+longer readable.</td> 
+</tr>
+<tr>
+ <td align="right"><a href="howtos10.php">scanning</a></td>
+ <td align="center"><img align="top" src="../images/down-arrow.png"></td>
+ <td align="center"><img align="top" src="../images/down-arrow.png"></td>
+ <td></td>
+</tr>
+<tr>
+<td>20. Aug 2007</td>
+<td><img align="top" src="../images/bad-cd.png"></td>
+<td><img align="top" src="../images/bad-cd.png"></td>
+<td>Joe downloads dvdisaster and performs
+<a href="howtos10.php">a read error scan</a>. 
+He finds out that the CD contains 25000 unreadable sectors. A scan
+of the second CD reveals that it has developed 1500 unreadable sectors
+gone unnoticed so far. </td>
+</tr>
+<tr>
+ <td align="right">reading</td>
+ <td align="center"><img align="top" src="../images/down-arrow.png"></td>
+ <td align="center"><img align="top" src="../images/down-arrow.png"></td>
+ <td></td>
+</tr>
+<tr><td colspan="4"> <p> </td></tr>
+<tr>
+<td>21. Aug 2007</td>
+<td><img align="top" src="../images/bad-image.png"></td>
+<td><img align="top" src="../images/bad-image.png"></td>
+<td>Joe uses dvdisaster to 
+read as much sectors as possible from the 
+defective media. But since he does not have error correction data
+there is no way of recalculating the unreadable sectors.</td>
+</tr>
+<tr>
+ <td align="right">many reading<br>attempts</td>
+ <td align="center"><img align="top" src="../images/down-arrow.png"></td>
+ <td align="center"><img align="top" src="../images/down-arrow.png"></td>
+ <td></td>
+</tr>
+<tr><td colspan="4"> <p> </td></tr>
+<tr>
+<td>05. Sep 2007</td>
+<td><img align="top" src="../images/bad-image.png"></td>
+<td><img align="top" src="../images/good-image.png"></td>
+<td>Joe takes advantage of dvdisaster's feature to complete images 
+through multiple reading passes. He moves the defective images to
+several computers to perform reading attempts with different drives.
+After two weeks of trying at least all missing sectors from the second
+CD have been read. However on the first CD still 21000 sectors
+remain unreadable by any drive he tried.</td>
+</tr>
+<tr>
+ <td align="right">only one CD<br>recovered</td>
+ <td align="center"><img align="top" src="../images/down-arrow.png"></td>
+ <td align="center"><img align="top" src="../images/down-arrow.png"></td>
+ <td></td>
+</tr>
+<tr><td colspan="4"> <p> </td></tr>
+<tr>
+<td>06. Sep 2007</td>
+<td><img align="top" src="../images/bad-cd.png"></td>
+<td><img align="top" src="../images/good-cd.png"></td>
+<td>Joe dismisses the first CD as unrecoverable and considers himself lucky
+to have a complete image from the second CD again.
+However if he had created error correction data in time, he'd probably <sup>1)</sup>
+saved two weeks of reading attempts and recovered the contents from both CDs.</td></tr>
+</table>
+<hr>
+<sup>1)</sup>The error correction assumes a typical aging process.
+If the CD gets severely damaged it becomes unrecoverable even with
+error correction data. Do not rely on dvdisaster alone for protecting
+important data; instead employ additional measures like creating 
+additional copies on different types of media.
+
+<!--- do not change below --->
+
+<?php
+# end_page() adds the footer line and closes the HTML properly.
+
+end_page();
+?>