Imported Upstream version 0.72
This commit is contained in:
TANIGUCHI Takaki
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documentation/en/howtos91_expand=2.html
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documentation/en/howtos91_expand=2.html
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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>Overview</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</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/howtos91.html"></a>
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<a href="../ru/howtos91.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" 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"></td><td>-</td><td><font size="-1">with error correction files</font></td></tr>
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<tr><td valign="top"></td><td>-</td><td><font size="-1"><a href="howtos92.html">when augmenting images with error correction data</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>Testing compatibility between error correction files and ISO images</h3>
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<b>Motivation:</b> You want to write data to a medium and create an
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error correction file for it. In order to save time you do the following:
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<ol>
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<li>You create an ISO image using your CD/DVD/BD writing software.</li>
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<li>You write the image to a medium.</li>
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<li>You create the error correction file from the same image.</li>
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</ol>
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<b>Possible incompatibility:</b> The writing software creates a medium
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which does not exactly match the image. This might prevent the error
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correction from recovering the medium contents when it becomes defective.
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<p>
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<b>How to test compatibility:</b><p>
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Please note that some steps are only sketched out here;
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follow the links to the respective sections to find detailed instructions
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and examples.<p>
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<table>
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<tr>
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<td width="200px" align="center"><img src="../images/good-image.png">
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<p><img src="../images/down-fork-arrow.png"></td>
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<td> </td>
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<td valign="top"><b>Create an ISO image of the data</b> you want
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to write on the medium. If you need help on creating ISO images
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please refer to the
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<a href="howtos33_way=1.html">example of creating ISO images</a>.
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</td>
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</tr>
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</table>
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<table>
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<tr>
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<td width="100px" align="center">
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<img src="../images/good-cd.png" border="0" align="center"><p>
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<img src="../images/down-arrow.png" border="0">
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</td>
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<td width="100px" align="center" valign="top">
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<img src="../images/ecc.png" border="0" align="center">
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</td>
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<td> </td>
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<td valign="top"><b>Write the medium and create the error correction file.</b>
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Use the just created image to
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<a href="howtos33_way=3.html#c">write the medium</a>.
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Then perform these <a href="howtos22.html#ecc">basic settings</a> and
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<a href="howtos23_way=2.html">create an error correction file</a>
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from the image.
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</td>
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</tr>
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</table>
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<table>
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<tr>
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<td width="100px" align="center">
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<img src="../images/good-image2.png" border="0"><p>
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<img src="../images/down-arrow.png" border="0">
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</td>
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<td width="100px" align="center"> </td>
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<td> </td>
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<td valign="top"><b>Create a <i>second</i> image from the <i>written</i>
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medium.
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</b> Use these <a href="howtos22.html#read">settings</a>
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and read the medium as described
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in <a href="howtos23_way=1.html">creating an image</a>
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for making an error correction file. However you can stop the walk-through
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when the reading is finished as we do not need to create the error
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correction file again.
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</td>
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</tr>
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</table>
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<table>
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<tr>
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<td width="200px" align="center">
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<a href="howtosa2.html">
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<img src="../images/select-image.png" border="0">
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<br><img src="../images/down-arrow.png" border="0"></a></td>
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<td> </td>
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<td valign="top"><b>Enter the name of the <i>second</i> ISO image</b>
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which you have just read from the medium. Please note that the following
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test is useless when working with the image which was initially created
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using the CD/DVD/BD authoring software.
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</td>
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</tr>
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</table>
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<table>
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<tr>
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<td width="200px" align="center">
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<a href="howtosa3.html">
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<img src="../images/select-ecc.png" border="0">
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<br><img src="../images/down-arrow.png" border="0"></a></td>
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<td> </td>
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<td valign="top">
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<b>Enter the name of the error correction file</b>
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in case it is not already present from the previous actions.
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</td>
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</tr>
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</table>
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<table>
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<tr>
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<td width="200px" align="center">
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<a href="howtosa4.html">
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<img src="images/compare-icon.png" border="0">
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<br><img src="../images/down-arrow.png" border="0"></a></td>
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<td> </td>
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<td valign="top"><b>Start the evaluation</b> by clicking
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on the "Verify" button.</td>
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</tr>
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</table>
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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="howtos91_expand=1.html#snap1"> <img src="thumbnails/compat-okay-rs01.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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<b>Look at the verification results.</b>
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If you get the green messages "Good image." and "Good error correction file."
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your authoring software and dvdisaster are compatible. You can continue
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creating the error correction files directly from the ISO images produced
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by the authoring software.
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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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<hr>
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<a name="err"> </a>
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<b>Possible error causes and remedy:</b><p>
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<!--- begin of screen shot --->
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<table class="screenshot">
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<tr><td>
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<a name="snap2"></a>
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<b>Typical problem: wrong image size.</b>
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The verification may find out that the image is larger as expected.
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Typically the difference is 150 or 300 sectors for CD media and
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1-15 sectors for DVD/BD media. These might simply be zero padding sectors
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appended by the writing software. To find out if this really is the case
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do the following:
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</td></tr>
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<tr><td align="center">
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<a href="howtos91_expand=0.html#snap2">
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<img src="images/compat-150-rs01.png">
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</a>
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</td></tr>
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<tr><td align="center">Screen shot: Wrong image size.</td></tr>
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</table><table>
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<tr>
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<td width="200px" align="center">
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<img src="../images/down-arrow.png" border="0">
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</td>
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</tr>
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</table>
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<!--- end 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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<img src="images/fix-icon.png" border="0">
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<p><img src="../images/down-arrow.png" border="0"></td>
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<td> </td>
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<td valign="top"><b>Start a recovery process.</b>
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</td>
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</tr>
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</table>
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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="snap3"></a>
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<a href="howtos91_expand=3.html#snap3"> <img src="thumbnails/compat-dialog-rs01.png" border="0">
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<br><img src="../images/down-arrow.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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<b>Confirm the dialog.</b>
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A dialog will appear asking you if it is okay to remove the superflous
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sectors from the image. Answer "OK".
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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>
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<td width="200px" align="center">
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<img src="images/stop-icon.png" border="0">
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<p><img src="../images/down-arrow.png" border="0"></td>
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<td> </td>
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<td valign="top"><b>Stop the recovery process,</b>
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as after truncating the image there is nothing more to do.
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</td>
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</tr>
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</table>
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<table>
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<tr>
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<td width="200px" align="center">
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<a href="howtosa4.html">
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<img src="images/compare-icon.png" border="0">
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<p><img src="../images/down-arrow.png" border="0"></a></td>
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<td> </td>
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<td valign="top"><b>Start the verification again</b>
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by clicking on the "Verify" button.</td>
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</tr>
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</table>
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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="snap4"></a>
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<a href="howtos91_expand=4.html#snap4"> <img src="thumbnails/compat-okay-rs01.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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<b>Consider the new results.</b>
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If you now get the green messages "Good image." and "Good error correction
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file." your problem is purely cosmetic: The writing software has indeed
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added zero padding sectors while writing the medium.
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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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<font color="#800000">If the problem persists after carrying out the above
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steps do <i>not</i> assume that dvdisaster and the writing software
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are compatible. The created error correction files will probably be
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unusable.</font> <p>
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Use the following method for creating the error correction files instead:
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<hr>
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<pre> </pre>
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<b>Alternative method avoiding incompatibilities:</b>
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<ol>
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<li>First write the data to the medium.</li>
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<li>Use dvdisaster to create an ISO image from the written medium.</li>
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<li>Use this image to create the error correction file.</li>
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</ol>
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This method takes more time due to the additional reading process,
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but it also has the advantage of testing the newly created
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medium for readability.
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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 2004-2009 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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Reference in New Issue
Block a user