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<td class="h1"> Backups on CD
<br>
Chapter 2 Quick Reference</td>
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<h2><a name="s-installing">2.1 Installing BackupOnCd</a></h2>
<p>Just extract the tarball. Copy the executables <code>/usr/local/sbin</code> and the folder <code>etc/backuponcd</code> to <code>/etc</code>. With the debian package you should have nothing to do.</p>
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<h3><a name="s2.1.1">2.1.1 Dependencies</a></h3>
<p>On a debian system you need to have installed the following packages:</p>
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<pre>
textutils
shellutils
fileutils
sed
awk
findutils
mount
cdrecord
mkisofs >> 1.8a
tar or
afio
gzip
</pre>
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<p>As you see everything is done with standard tools.</p>
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<h3><a name="s2.1.2">2.1.2 Customizing (a must)</a></h3>
<ul>
<li>
With the settings BackupOnCd comes with, you need 400 Mbyte free disk space under <code>/tmp/</code>. If free space doesn't fit you need to edit <a href="ch-settings.html#s-global.rc"><code>/etc/backuponcd/global.rc</code>, Section 4.2</a>.
<p>You have several options:</p>
<ul>
<li>Change the variable <code>TMP="..."</code> to a directory where is enough disk space</li>
<li>
Enlarge the variable <code>tracks=</code> and decrease <code>tracksize=</code>
<p>Note, that a so-called lead-out is needed for each track, the amount of space on the disk is decreased by the count of tracks. For details have a look at <code><a href="http://localhost/doc/cdrecord/README.multi">/usr/doc/cdrecord/README.multi</a></code>, or visit the homepage of <code><a href="http://www.fokus.gmd.de/research/cc/glone/employees/joerg.schilling/private/cdrecord.html">cdrecord</a></code>. You can play with these settings, if one track doesn't fit on the CD it is
stored on the next CD.</p>
</li>
<li>
If free space is very small, you can force BackupOnCd to do the burning <em>not</em> parallel to the backup. If you did that, only one <code>tracksize</code> space is needed. Edit <code>/sbin/backuponcd_toast.sh</code>, delete the single ampersand at the end of the line:
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<pre>
( nice -n -10 mkisofs -R -J -L $vol $volid \
$multiinfo $toast_dir | cdrecord -v $dev \
$devdepend $blank fs=8m -multi - && rm \
$toast_dir/* ) 2>> $logfile &
</pre>
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</li>
<li>A better option: Get an old 850 Mbyte disk and mount it to <code>/tmp</code>.</li>
</ul>
</li>
<li>Try out to change the variable <code>devdepend="speed=2 -eject"</code> to <code>devdepend="speed=x"</code>, while speed is the speed of your cdwriter. Please email me if it works or not. A Philipps CDD 3600 does not read the trackinfo if the CD is not ejected after each track. I think this toaster does a reset if the CD is ejected. You cannot run into trouble by playing this setting, a failed backup is all what can happen.</li>
<li>
Edit the line <code>archiver=</code>, choose tar or afio. Note, that find is <em>not</em> used if you choosed tar as archiver. The main disadvantage is, that no filelist is generated. Tar often is used as followed:
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<pre>
find . -not -type d | grep -v -f excludelist | \
tee -a filelist | tar -cvz --file=archive.tar.gz \
--files-from=-
</pre>
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<p>With the above line empty directorys and each directory found in <code>excludelist</code> (ususally mountpoints) would <em>not</em> be archived. In my opinion this wouldn't be a backup, so tar is used as below:</p>
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tar -cvz -X $excludelist --file=- .
</pre>
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<p>It should be easy for you to edit <code>/sbin/backupond</code> if you don't like this quality.</p>
</li>
<li>Edit <code>rawdevice=</code> and <code>mountpt=</code></li>
</ul>
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<h2><a name="s2.2">2.2 Enjoying</a></h2>
<p>See <a href="ch1.html#s-usage">Usage, Section 1.1</a> for commandline options. Copy or move the file <a href="ch-settings.html#s-excludelist"><code>/usr/doc/backuponcd/samples/excludelist</code>, Section 4.1</a> to a place where you want and edit it, so that it fits to your system or the system which you want to backup.</p>
<p>The remaining is fun. Everything is done automaticly, the backup will get compared, logliles and scripts are burned on the last CD. It should be easy to do a restore with a system started from a floppy.</p>
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Backups on CD
<br>
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<address>
17 April 2000
<br>
Holger Nassenstein <code><a href="mailto:backups@tuxoncd.de">backups@tuxoncd.de</a></code>
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