311 lines
12 KiB
HTML
311 lines
12 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>dvdisaster</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 (pl1)</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/howtos22.html"></a>
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<a href="../ru/howtos22.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"></td><td>-</td><td><font size="-1"><a href="howtos21.html">Decision help</a></font></td></tr>
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<tr><td valign="top"></td><td>-</td><td><font size="-1">Basic settings for reading</font></td></tr>
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<tr><td valign="top"></td><td>-</td><td><font size="-1"><a href="howtos23.html">Creating the error correction file</a></font></td></tr>
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<tr><td valign="top"></td><td>-</td><td><font size="-1"><a href="howtos24.html">Archiving error correction files</a></font></td></tr>
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<tr><td valign="top"></td><td>-</td><td><font size="-1"><a href="howtos25.html">Advanced settings</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" 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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<table width="100%" bgcolor="#f0f0f0">
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<tr><td><font size="+1"><b>Creating error correction files</b></font></td>
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<td rowspan="2" align="right"><img src="images/create-icon.png"></td></tr>
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<tr><td><i>Basic settings</i></td></tr>
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</table><p>
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<!--- Insert actual page content below --->
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<!--- begin of screen shot --->
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<table>
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<tr>
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<td valign="top">
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<table><tr><td valign="top"><img src="../images/prefs-icon.png" valign="bottom"></td>
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<td>The following tabs are found in the configuration dialog.
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Open the dialog by selecting the symbol marked green in the screen shot
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(click the image to expand it). The symbol may look different
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due to the symbol theme you are using.</td>
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</tr></table>
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</td>
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<td>
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<a name="snap1"></a>
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<table class="thumbnail" width="160px">
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<tr><td><font size="-1">Opening the configuration dialog.</font></td></tr>
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<tr><td><a href="howtos22_expand=1.html#snap1"><img src="thumbnails/global-prefs-invoke.png"></a></td></tr>
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</table>
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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="read"><b>Settings for reading the image from the medium</b></a><p>
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<table width="100%" cellspacing="5">
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<tr>
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<td><img src="../images/good-image.png"></td>
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<td>If you already have an ISO image available you can skip
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the next two tabs and proceed with the <a href="howtos22_expand=2.html#ecc">error correction settings</a>.
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But make sure that you really have an ISO type image; other formats like ".nrg"
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do not produce usable error correction data.
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</td>
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</tr>
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</table><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>"Image" tab.</b> Make sure that the image size is determined
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using the "ISO/UDF" setting and that the linear reading strategy is selected.
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The required selections are marked green. Leave the other settings at their defaults.
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<p>
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</td></tr>
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<tr><td align="center">
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<a href="howtos22.html#snap2">
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<img src="images/create-prefs-image.png">
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</a>
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</td></tr>
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<tr><td align="center">Screen shot: "Image" tab.</td></tr>
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</table><pre> </pre>
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<!--- end of screen shot --->
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<pre> </pre>
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<!--- begin of screen shot --->
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<table>
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<tr>
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<td valign="top">
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<b>"Drive" tab.</b> Reading data from the drive while it is spinning up
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can generate spurious error reports. Adjust the spin up time for your drive
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(typically 5-10 seconds) in the field marked green to make dvdisaster wait
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for the appropriate time.<p>
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Leave the other settings at the shown values.<p>
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</td>
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<td>
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<a name="snap3"></a>
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<table class="thumbnail" width="160px">
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<tr><td><font size="-1">"Drive" tab.</font></td></tr>
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<tr><td><a href="howtos22_expand=3.html#snap3"><img src="thumbnails/create-prefs-drive.png"></a></td></tr>
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</table>
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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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<!--- begin of screen shot --->
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<table>
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<tr>
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<td valign="top">
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<b>"Read attempts".</b> The option "Read and analyse raw sectors" (marked green)
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uses additional information provided by the drive to check the integrity of read
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data. This is recommended as we are interested in creating
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error correction data from a properly read image.
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On the other hand since error correction data can only be created from fully
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readable media we do not need multiple reading attempts and caching of raw sectors
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as shown in the screen shot.
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</td>
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<td>
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<a name="snap4"></a>
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<table class="thumbnail" width="160px">
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<tr><td><font size="-1">"Read attempts".</font></td></tr>
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<tr><td><a href="howtos22_expand=4.html#snap4"><img src="thumbnails/create-prefs-read-attempts.png"></a></td></tr>
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</table>
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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="ecc"><b>Error correction settings</b></a><p>
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<!--- begin of screen shot --->
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<table>
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<tr>
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<td valign="top">
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<b>"Error correction" tab.</b> First choose "Error correction file (RS01)" in
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the "Storage method" list (green marking). By picking the redundancy you will
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determine the maximum error correction capability: An error correction file
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with x% redundancy can correct up to x% of read errors under optimal circumstances.
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Since the best case is usually not encountered you should add some safety margin
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to the redundancy by picking one of the following choices (see yellow markings);
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<ul>
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<li>The "normal" and "high" presets provide a redundancy of 14.3% and 33.5%
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respectively. These two settings are very fast in creating error correction
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files due to optimized program code.</li>
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<li>You can freely choose the redundancy by activating the "other" item and dragging
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the slider.</li>
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<li>By activating the "Use at most" button you can specify the error correction
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file size in MB. dvdisaster will choose a suitable redundancy so that the
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error correction file will be close to but not larger than the specified size.
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</li>
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</ul>
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The redundancy will also determine the size of the error correction file;
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using x% redundancy will create an error correction file of about x% the size
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of the image. Using redundancies lower than the "normal" setting (14.3%) is not
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recommended as the error correction might be overloaded too quickly.
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</td>
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<td>
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<a name="snap5"></a>
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<table class="thumbnail" width="160px">
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<tr><td><font size="-1">"Error correction" tab.</font></td></tr>
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<tr><td><a href="howtos22_expand=5.html#snap5"><img src="thumbnails/create-prefs-ecc.png"></a></td></tr>
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</table>
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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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<!--- begin of screen shot --->
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<table>
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<tr>
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<td valign="top">
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<b>"Files" tab.</b> If your operating system can not create files larger than 2GB
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then you must choose the "Split files " setting (marked green).
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In that case dvdisaster will
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create up to 100 segments called "medium00.iso", "medium01.iso" etc. instead
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of a single "medium.iso" file. Using this option results in a small performance hit.
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This option is mostly useful under Windows if the old FAT32 file system is still used.
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Leave the other settings off for the moment; suggestions for further
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<a href="howtos25.html">optimization</a> follow later.
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</td>
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<td>
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<a name="snap6"></a>
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<table class="thumbnail" width="160px">
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<tr><td><font size="-1">"Files" tab.</font></td></tr>
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<tr><td><a href="howtos22_expand=6.html#snap6"><img src="thumbnails/create-prefs-file.png"></a></td></tr>
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</table>
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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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<pre> </pre>
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<b>Not used tabs</b><p>
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The "Misc" tab currently has only functions for creating
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log files. This is helpful for sending in <a href="feedback.html">bug reports</a>
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but should be left off during normal operation.
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The "Appearance" tab allows you to adapt the output colors to your taste,
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but these have no further effects on the error correction data creation.
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<pre> </pre>
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<a href="howtos23.html">Creating the error correction data...</a>
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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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