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<span id="Emergency-save"></span><div class="header">
<p>
Next: <a href="Optical-media.html" accesskey="n" rel="next">Optical media</a>, Previous: <a href="Mapfile-structure.html" accesskey="p" rel="prev">Mapfile structure</a>, Up: <a href="index.html" accesskey="u" rel="up">Top</a> [<a href="Concept-index.html" title="Index" rel="index">Index</a>]</p>
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<span id="Saving-the-mapfile-in-case-of-trouble"></span><h2 class="chapter">8 Saving the mapfile in case of trouble</h2>
<span id="index-emergency-save"></span>
<p>The mapfile is an essential part of ddrescue’s effectiveness. Without a
mapfile, ddrescue can’t resume a rescue, only reinitiate it. Given that
a difficult rescue may take days to complete, it would be a serious
drawback if the mapfile were lost because of a solvable problem like a
lack of space on the device the mapfile is written to.
</p>
<p>In case of trouble writing the mapfile, ddrescue will print a message
like this:
</p>
<div class="example">
<pre class="example">Error writing mapfile '<var>mapfile</var>': No space left on device
Fix the problem and press ENTER to retry,
or E+ENTER for an emergency save and exit,
or Q+ENTER to abort.
</pre></div>
<p>You may try to fix the problem, for example deleting some files to make
room for the mapfile, and press <tt class="key">Return</tt> to retry.
</p>
<p>If the problem can’t be fixed, you may press <tt class="key">e</tt> followed by
<tt class="key">Return</tt> to try an emergency save and exit. Ddrescue will try to
write the mapfile to the file <samp>ddrescue.map</samp> in the current
directory or, if this fails, to <samp>$HOME/ddrescue.map</samp>. If the
mapfile is written succesfully, ddrescue will exit with status 1. Else
it will print the above message again.
</p>
<p>Or you may press <tt class="key">q</tt> followed by <tt class="key">Return</tt> to quit and exit with
status 1. In this case the contents of the mapfile will be lost.
</p>
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