126 lines
4.4 KiB
PHP
126 lines
4.4 KiB
PHP
<?php
|
|
# dvdisaster: English homepage translation
|
|
# Copyright (C) 2004-2010 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();
|
|
?>
|