Index: doc/src/sgml/backup.sgml
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RCS file: /cvsroot/pgsql/doc/src/sgml/backup.sgml,v
retrieving revision 2.143
diff -c -c -r2.143 backup.sgml
*** doc/src/sgml/backup.sgml	22 Feb 2010 11:47:30 -0000	2.143
--- doc/src/sgml/backup.sgml	22 Feb 2010 17:14:02 -0000
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*** 484,489 ****
--- 484,499 ----
    </itemizedlist>
    </para>
  
+   <note>
+    <para>
+     <application>pg_dump</application> and
+     <application>pg_dumpall</application> do not produce file-system-level
+     backups and cannot be used as part of a continuous-archiving solution.
+     Such dumps are <emphasis>logical</> and do not contain enough
+     information to used by WAL reply.
+    </para>
+   </note>
+ 
    <para>
     As with the plain file-system-backup technique, this method can only
     support restoration of an entire database cluster, not a subset.
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*** 744,750 ****
     <listitem>
      <para>
       Perform the backup, using any convenient file-system-backup tool
!      such as <application>tar</> or <application>cpio</>.  It is neither
       necessary nor desirable to stop normal operation of the database
       while you do this.
      </para>
--- 754,762 ----
     <listitem>
      <para>
       Perform the backup, using any convenient file-system-backup tool
!      such as <application>tar</> or <application>cpio</> (not
!      <application>pg_dump</application> or
!      <application>pg_dumpall</application>).  It is neither
       necessary nor desirable to stop normal operation of the database
       while you do this.
      </para>