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<font size="+3"><b>dvdisaster</b></font>
<i>Version 0.72 (pl1)</i>
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<font size="+3"> </font><a href="http://dvdisaster.net/en/">To the Internet version</a>
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<font size="-1"><b>Contents</b></font>
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<tr><td colspan=3><font size="-1"><a href="news.html">News</a></font></td></tr>
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<tr><td colspan=3><font size="-1"><a href="index.html">Overview</a></font></td></tr>
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<tr><td colspan=3><font size="-1"><a href="howtos.html">Howtos</a></font></td></tr>
<tr><td valign="top" width="1%">·</td><td colspan=2><font size="-1"><a href="howtos60.html">The big picture</a></font></td></tr>
<tr><td valign="top" width="1%">·</td><td colspan=2><font size="-1"><a href="howtos10.html">Scanning media for errors</a></font></td></tr>
<tr><td valign="top" width="1%">·</td><td colspan=2><font size="-1"><a href="howtos20.html">Putting error correction data on a separate file</a></font></td></tr>
<tr><td valign="top" width="1%">·</td><td colspan=2><font size="-1"><a href="howtos30.html">Putting error correction data on the medium</a></font></td></tr>
<tr><td valign="top" width="1%">·</td><td colspan=2><font size="-1"><a href="howtos40.html">Recovering media images</a></font></td></tr>
<tr><td valign="top" width="1%">·</td><td colspan=2><font size="-1"><a href="howtos50.html">Getting information about images and error correction data</a></font></td></tr>
<tr><td valign="top"></td><td>-</td><td><font size="-1"><a href="howtos51.html">Show information</a></font></td></tr>
<tr><td valign="top"></td><td>-</td><td><font size="-1"><a href="howtos52.html">Results for error correction files</a></font></td></tr>
<tr><td valign="top"></td><td>-</td><td><font size="-1"><a href="howtos53.html">Results für augmented images</a></font></td></tr>
<tr><td valign="top"></td><td>-</td><td><font size="-1">Examples</font></td></tr>
<tr><td valign="top" width="1%">·</td><td colspan=2><font size="-1"><a href="howtos90.html">Testing image compatibility</a></font></td></tr>
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<h3>Examples</h3>
You have already seen examples of
<a href="howtos52_expand=1.html">good images and error correction files</a>
and <a href="howtos53_expand=1.html">good images augmented with
error correction data</a> on the previous pages.
In the following some typical examples of error situations are presented:<p>
<hr>
Here are two typical cases of showing information for images
which have not yet been fully recovered:<p>
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<b>Image with unreadable sectors and error correction file</b>.
The image shown here contains 6245 unreadable sectors; error correction
data is present by means of an error correction file.
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<tr><td><font size="-1">Image with unreadable sectors, RS01</font></td></tr>
<tr><td><a href="howtos59_expand=1.html#snap1"><img src="thumbnails/compare-bad-rs01.png"></a></td></tr>
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<b>Image augmented with error correction data, containing unreadable sectors</b>.
This image contains unreadable sectors towards its end. Especially the
ECC section is affected since the error correction data is located
at the end of the image. Please note that this does not weaken the
error correction since its corrective power is independent from the
error location: 10000 errors at the beginning of the medium are just as easy
to correct as 10000 errors towards its end.<br>
The RS02 encoder which was used for creating the error correction
data is capable of predicting the odds of a successful image recovery.
These are shown at the end of the error correction data output area.
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<tr><td><font size="-1">Image with unreadable sectors, RS02</font></td></tr>
<tr><td><a href="howtos59_expand=2.html#snap2"><img src="thumbnails/compare-bad-rs02.png"></a></td></tr>
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<b>Image from aborted reading process</b>.
This image is shorter than expected; this usually happens when
the reading process is stopped prematurely.
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<img src="images/compare-trunc-rs01.png">
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<tr><td align="center">Screen shot: Aborted read</td></tr>
</table><pre> </pre>
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<b>Image is larger than expected</b>.
This image is larger than expected; possible causes are discussed
in the section about <a href="howtos90.html">image compatibility</a>.
It may be possible to recover from this problem; see hints related to
<a href="howtos91.html#err">using error correction files</a> and
<a href="howtos92.html#err">using augmented images</a>.
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<tr><td><font size="-1">Image too large</font></td></tr>
<tr><td><a href="howtos59_expand=4.html#snap4"><img src="thumbnails/compat-150-rs01.png"></a></td></tr>
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<b>Wrong error correction file</b>.
The error correction file was created for a different image.
This causes lots of CRC errors since the sectors have different contents.
However the most important hint is:<p>
Fingerprint: <font color="red">mismatch</font><p>
This tells you that the error correction file does not belong to the image.
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<tr><td><font size="-1">Wrong error correction file</font></td></tr>
<tr><td><a href="howtos59_expand=5.html#snap5"><img src="thumbnails/compare-mismatch-rs01.png"></a></td></tr>
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<table cellpadding="10"><tr><td><a href="http://dvdisaster.net/legacy/en/index.html"><font size="-1">Old documentation (V0.70)</font></a></td></tr></table>
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<i> Copyright 2004-2009 Carsten Gnörlich.<br>
Verbatim copying and distribution of this entire article is permitted in any medium, provided this notice is preserved.
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distrib
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Mandriva
>
2010.0
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i586
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media
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contrib-release
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by-pkgid
>
93f0f6b9dba72659e97f5e08b2db3f56
>
files
>
1672
