245 lines
8.9 KiB
HTML
245 lines
8.9 KiB
HTML
<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>Results für augmented images</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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<font size="+3"><b>dvdisaster</b></font>
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<i>Version 0.72 (pl3)</i>
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</td>
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<td align="right">
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<font size="+3"> </font><a href="http://dvdisaster.net/en/">To the Internet version</a>
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<a href="../de/howtos53.html"></a>
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<a href="../ru/howtos53.html"></a>
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</td>
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</tr>
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</table>
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<!--- Language chooser or separator --->
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<table width="100%" cellpadding="0" border="0">
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<tr bgcolor="#000000">
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<td colspan="2" width="100%"><img width=1 height=1 alt=""></td>
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</tr>
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<tr><td colspan="2" width="100%" height="10">
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<img width=1 height=1 alt="">
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</td></tr>
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</table>
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<!--- Main body (Navigation, actual page content, optional news column) --->
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<table width="100%" cellspacing=0>
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<tr>
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<!--- Navigation --->
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<td bgcolor="#f0f0f0" valign="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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<font size="-1"><b>Contents</b></font>
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<table width="100%" cellpadding="0" cellspacing="0">
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<tr bgcolor="#000000">
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<td width="100%"><img width=1 height=1 alt=""></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><font size="-1"><a href="news.html">News</a></font></td></tr>
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<tr><td></td><td></td><td height="10"></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></td><td></td><td height="10"></td></tr>
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<tr><td colspan=3><font size="-1"><a href="howtos.html">Howtos</a></font></td></tr>
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<tr><td valign="top" width="1%">·</td><td colspan=2><font size="-1"><a href="howtos60.html">The big picture</a></font></td></tr>
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<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>
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<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>
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<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>
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<tr><td valign="top" width="1%">·</td><td colspan=2><font size="-1"><a href="howtos40.html">Recovering media images</a></font></td></tr>
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<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>
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<tr><td valign="top"></td><td>-</td><td><font size="-1"><a href="howtos51.html">Show information</a></font></td></tr>
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<tr><td valign="top"></td><td>-</td><td><font size="-1"><a href="howtos52.html">Results for error correction files</a></font></td></tr>
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<tr><td valign="top"></td><td>-</td><td><font size="-1">Results für augmented images</font></td></tr>
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<tr><td valign="top"></td><td>-</td><td><font size="-1"><a href="howtos59.html">Examples</a></font></td></tr>
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<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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<tr><td valign="top" width="1%">·</td><td colspan=2><font size="-1"><a href="howtosa0.html">Dialogs and buttons</a></font></td></tr>
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<tr><td></td><td></td><td height="10"></td></tr>
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<tr><td colspan=3><font size="-1"><a href="download.html">Download</a></font></td></tr>
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<tr><td></td><td></td><td height="10"></td></tr>
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<tr><td colspan=3><font size="-1"><a href="qa.html">Questions and Answers</a></font></td></tr>
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<tr><td></td><td></td><td height="10"></td></tr>
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<tr><td colspan=3><font size="-1"><a href="feedback.html">Bug reporting</a></font></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 valign="top" width="77%" rowspan="2">
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<!--- Insert actual page content below --->
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<h3>Results for images augmented with error correction data</h3>
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<!--- begin of screen shot --->
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<table>
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<tr>
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<td width="200px" align="center">
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<a name="snap1"></a>
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<a href="howtos53_expand=1.html#snap1"> <img src="thumbnails/compat-okay-rs02.png" border="0">
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</a>
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</td><td> </td>
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<td valign="top">
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When verifying an image against its embedded error correction data the
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information will be given with respect to:
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<ul>
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<li>the whole (augmented) image</li>
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<li>the error correction data part:</li>
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</td>
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</tr>
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</table><p>
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<!--- end of screen shot --->
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<table>
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<tr><td colspan="2">Output field <b>"Image file summary":</b><br><hr></td><td></td></tr>
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<tr>
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<td valign="top">Medium sectors:</td>
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<td>The number of sectors in the augmented image (including the sectors added
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by dvdisaster; one sector = 2KB).</td>
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</tr>
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<tr><td> </td><td></td></tr>
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<tr>
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<td valign="top">Data checksum:</td>
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<td>The MD5 checksum of the original image (prior to augmenting it with error
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correction data).</td>
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</tr>
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<tr><td> </td><td></td></tr>
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<tr>
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<td>
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Ecc headers:<br>
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Data section:<br>
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Crc section:<br>
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Ecc section:
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</td>
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<td valign="top">The augmented image consists of three sections plus
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some ecc header sectors embedded into them. These values describe how many
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sectors are unreadable in the respective sections.
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</td>
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</tr>
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<tr><td> </td><td></td></tr>
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<tr><td colspan="2">
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If all values in this output field are okay the message
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"<font color="#008000">Good image.</font>" appears.
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Otherwise the most important error will be explained there.
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</td>
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</tr>
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<tr><td> </td><td></td></tr>
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<tr><td colspan="2">Output field <b>"Error correction data":</b><br><hr></td><td></td></tr>
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<tr>
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<td valign="top">Created by:</td>
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<td>Prints the dvdisaster version which was used for creating the
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error correction data. Alpha/developer versions are highlighted in red.</td>
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</tr>
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<tr><td> </td><td></td></tr>
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<tr>
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<td valign="top">Method:</td>
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<td>The method and redundancy used for creating the error correction data.</td>
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</tr>
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<tr><td> </td><td></td></tr>
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<tr>
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<td valign="top">Requires:</td>
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<td>Processing the error correction data requires at least the shown
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version of dvdisaster.</td>
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</tr>
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<tr><td> </td><td></td></tr>
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<tr>
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<td valign="top">Medium sectors:</td>
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<td>The first value is the number of sectors in the augmented image;
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the second one describes the number of sectors the image had before it
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was processed with dvdisaster. Since the error correction data is placed
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behind the user data, the checksum of the original image can be
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obtained as follows (using the command line of GNU/Linux):<br>
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<tt>head -c $((2048*121353)) medium.iso | md5sum</tt><br>
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The first parameter for <i>head</i> is the sector size (2048)
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multiplied with the original image length (121353). This property
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of augmented images can also be used to cut off the error correction data:<br>
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<tt>head -c $((2048*121353)) medium.iso >stripped_image.iso</tt>
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</td>
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</tr>
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<tr><td> </td><td></td></tr>
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<tr>
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<td valign="top">Data checksum:</td>
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<td>The MD5 checksum of the original image (see previous explanations).</td>
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</tr>
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<tr><td> </td><td></td></tr>
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<tr>
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<td valign="top">
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CRC checksum:<br>
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ECC checksum:</td>
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<td>MD5 checksums of the CRC and ECC sections of the augmented image.
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These two can not be easily reproduced outside of dvdisaster.</td>
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</tr>
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<tr><td> </td><td></td></tr>
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</tr>
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<tr><td colspan="2">
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If all values in this output field are okay the message
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"<font color="#008000">Good error correction data.</font>" appears.
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Otherwise the most important error will be explained there.
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</td>
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</tr>
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</table>
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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 valign="bottom">
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<td bgcolor="#f0f0f0">
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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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</td>
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<td></td>
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<td></td>
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</tr>
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</table> <!--- end of main body table --->
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<!--- Page footer --->
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<table width="100%" cellpadding="0" border="0">
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<tr><td colspan="2" width="100%" height="10"><img width=1 height=1 alt=""></td>
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</tr>
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<tr bgcolor="#000000"><td colspan="2" width="100%"><img width=1 height=1 alt=""></td>
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</tr>
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<tr>
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<td align="center">
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<font size="-1">
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<i> Copyright 2004-2011 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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</font>
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</td>
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</tr>
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<tr bgcolor="#000000"><td colspan="2" width="100%"><img width=1 height=1 alt=""></td>
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</tr>
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</table>
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</body>
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</html>
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