Remove unnecessary, potentially dangerous sysctl command.

Discussed on:	-current@
Approved by:	gjb

en_US.ISO8859-1/books/handbook/install/chapter.sgml

@@ -647,12 +647,6 @@
 	    <step>
 	      <title>Writing the Image with &man.dd.1;</title>
 
-	      <para>Set the <varname>kern.geom.debugflags</varname> sysctl to
-		be able to write a master boot record to the target
-		device.</para>
-
-	      <screen><userinput>&prompt.root; sysctl kern.geom.debugflags=16</userinput></screen>
-
 	      <para>The <filename>.img</filename> file
 		is <emphasis>not</emphasis> a regular file you copy to the
 		memory stick.  It is an image of the complete contents of the
@@ -661,6 +655,13 @@
 		&man.dd.1; to write the image directly to the disk:</para>
 
 	      <screen>&prompt.root; <userinput>dd if=&os;-&rel.current;-RELEASE-&arch.i386;-memstick.img of=/dev/<replaceable>da0</replaceable> bs=64k</userinput></screen>
+
+	      <para>If an
+		<computeroutput>Operation not permitted</computeroutput>
+		error is displayed, make certain that the target device
+		is not in use, mounted, or being automounted by some
+		well-intentioned utility program.  Then try
+		again.</para>
 	    </step>
 	  </procedure>