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Date: Sat, 11 Sep 1999 12:13:13 +0900
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From: Jun Kuriyama <kuriyama@sky.rim.or.jp>
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Subject: [doc-jp 6643] <handbook> backups/chapter.sgml (1.12)
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$B!!$A$g$C$HD9$$$+$J!#%U%m%C%T!<$G%P%C%/%"%C%W$9$k$3$H$K6=L#$N$"$k?MJg=8!#(B
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Index: chapter.sgml
===================================================================
RCS file: /home/ncvs/doc/en_US.ISO_8859-1/books/handbook/backups/chapter.sgml,v
retrieving revision 1.11
retrieving revision 1.12
diff -u -r1.11 -r1.12
--- chapter.sgml	1999/09/06 06:52:53	1.11
+++ chapter.sgml	1999/09/10 00:56:44	1.12
@@ -1,7 +1,7 @@
 <!--
      The FreeBSD Documentation Project
 
-     $FreeBSD: doc/en_US.ISO_8859-1/books/handbook/backups/chapter.sgml,v 1.11 1999/09/06 06:52:53 peter Exp $
+     $FreeBSD: doc/en_US.ISO_8859-1/books/handbook/backups/chapter.sgml,v 1.12 1999/09/10 00:56:44 jim Exp $
 -->
 
 <chapter id="backups">
@@ -30,12 +30,6 @@
     remember to specify exactly what version of FreeBSD you are using and
     include as many details of your hardware as possible.</para>
 
-  <sect1>
-    <title>* What about backups to floppies?</title>
-
-    <para></para>
-  </sect1>
-
   <sect1 id="backups-tapebackups">
     <title>Tape Media</title>
     
@@ -606,6 +600,95 @@
 	
 	<para></para>
       </sect3>
+    </sect2>
+  </sect1>
+
+  <sect1 id="backups-floppybackups">
+    <title>What about backups to floppies?</title>
+
+    <sect2 id="floppies-using">
+      <title>Can I use floppies for backing up my data?</title>
+      
+      <para>Floppy disks are not really a suitable media for
+        making backups as:</para>
+
+      <itemizedlist>
+	<listitem>
+	  <para>The media is unreliable, especially over long periods of
+	    time</para>
+	</listitem>
+	
+	<listitem>
+	  <para>Backing up and restoring is very slow</para>
+	</listitem>
+	
+	<listitem>
+	  <para>They have a very limited capacity (the days of backing up
+	    an entire hard disk onto a dozen or so floppies has long since
+	    passed).</para>
+	</listitem>
+      </itemizedlist>
+
+      <para>However, if you have no other method of backing up your data then
+	floppy disks are better than no backup at all.</para>
+
+      <para>If you do have to use floppy disks then ensure that you use good
+	quality ones. Floppies that have been lying around the office for a
+	couple of years are a bad choice. Ideally use new ones from a
+	reputable manufacturer.</para>
+    </sect2>
+    
+    <sect2 id="floppies-creating">
+      <title>So how do I backup my data to floppies?</title>
+
+      <para>The best way to backup to floppy disk is to use
+        &man.tar.1; with the <option>-M</option> (multi volume) option, which
+	allows backups to span multiple floppies.</para>
+
+      <para>To backup all the files in the current directory and sub-directory
+	use this (as root):</para>
+
+      <screen>&prompt.root; <userinput>tar Mcvf /dev/rfd0 *</userinput></screen>
+
+      <para>When the first floppy is full &man.tar.1; will prompt you to
+	insert the next volume (because &man.tar.1; is media independent it
+	refers to volumes. In this context it means floppy disk)</para>
+
+      <screen>Prepare volume #2 for /dev/rfd0 and hit return:</screen>
+
+      <para>This is repeated (with the volume number incrementing) until all
+	the specified files have been archived.</para>
+    </sect2>
+
+    <sect2 id="floppies-compress">
+      <title>Can I compress my backups?</title>
+
+      <para>Unfortunately, &man.tar.1; will not allow the
+	<option>-z</option> option to be used for multi-volume archives.
+	You could, of course, &man.gzip.1; all the files, &man.tar.1; them to
+	the floppies, then &man.gunzip.1; the files again!</para>
+    </sect2>
+
+    <sect2 id="floppies-restoring">
+      <title>How do I restore my backups?</title>
+      
+      <para>To restore the entire archive use:</para>
+
+      <screen>&prompt.root; <userinput>tar Mxvf /dev/rfd0</userinput></screen>
+
+      <para>To restore only specific files you can either start with the first
+	floppy and use:</para>
+
+      <screen>&prompt.root; <userinput>tar Mxvf /dev/rfd0 <replaceable>filename</replaceable></userinput></screen>
+
+      <para>&man.tar.1; will prompt you to insert subsequent floppies until it
+	finds the required file.</para>
+
+      <para>Alternatively, if you know which floppy the file is on then you
+	can simply insert that floppy and use the same command as above. Note
+	that if the first file on the floppy is a continuation from the
+	previous one then &man.tar.1; will warn you that it cannot restore it,
+	even if you have not asked it to!</para>
     </sect2>
   </sect1>
 </chapter>


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