Regen from article.sgml 1.1.2.69.

svn path=/www/; revision=13426

en/releases/4.6R/errata.html

@@ -22,7 +22,7 @@
 
         <p class="PUBDATE">$FreeBSD:
         src/release/doc/en_US.ISO8859-1/errata/article.sgml,v
-        1.1.2.68 2002/06/15 23:52:22 bmah Exp $<br>
+        1.1.2.69 2002/06/19 18:57:20 bmah Exp $<br>
         </p>
         <hr>
       </div>
@@ -136,6 +136,106 @@
         contain this patch. To get an updated version, use <b
         class="APPLICATION">CVSup</b> to obtain a more recent ports
         collection.</p>
+
+        <p>Some FreeBSD/i386 users have experienced difficulties
+        reading from certain ATA CDROM drives. Specific models on
+        which this problem has been observed include the AOpen 48x,
+        52x, and 56x CDROM drives, as well as the Mitsumi Slim
+        CRMC-SR242S CDROM drive. A typical symptom is the following
+        error message on the console and/or <a href=
+        "http://www.FreeBSD.org/cgi/man.cgi?query=dmesg&sektion=8&manpath=FreeBSD+4.5-stable">
+        <span class="CITEREFENTRY"><span class=
+        "REFENTRYTITLE">dmesg</span>(8)</span></a> buffer
+        (sometimes accompanied by a kernel panic):</p>
+<pre class="SCREEN">
+    acd0: READ_BIG command timeout - resetting
+    ata1: resetting devices .. done
+</pre>
+
+        <p>In some cases, this bug can prevent installation of
+        FreeBSD from an affected CDROM drive. It can cause <a href=
+        "http://www.FreeBSD.org/cgi/man.cgi?query=sysinstall&sektion=8&manpath=FreeBSD+4.5-stable">
+        <span class="CITEREFENTRY"><span class=
+        "REFENTRYTITLE">sysinstall</span>(8)</span></a> to hang
+        while extracting distribution files from CD media.</p>
+
+        <p>A two-part workaround listed here has shown to be
+        helpful in some (but not necessarily all) cases. First, to
+        allow a CDROM installation, it is necessary to modify the
+        normal CDROM installation procedure:</p>
+
+        <div class="PROCEDURE">
+          <ol type="1">
+            <li>
+              <p>Start the computer with a FreeBSD installation
+              CDROM in the drive.</p>
+            </li>
+
+            <li>
+              <p>Wait for a console message similar to:</p>
+<pre class="SCREEN">
+    Hit [Enter] to boot immediately, or any other key for command prompt.
+    Booting [kernel] in 9 seconds...
+</pre>
+            </li>
+
+            <li>
+              <p>Immediately interrupt the boot process by pressing
+              the <b class="KEYCAP">Space</b> bar on the
+              keyboard.</p>
+            </li>
+
+            <li>
+              <p>Enter the following three lines at the <tt class=
+              "LITERAL">ok</tt> prompt:</p>
+<pre class="SCREEN">
+    <tt class="PROMPT">ok</tt> <tt class=
+"USERINPUT"><b>set hw.ata.ata_dma="1"</b></tt>
+</pre>
+<pre class="SCREEN">
+    <tt class="PROMPT">ok</tt> <tt class=
+"USERINPUT"><b>set hw.ata.atapi_dma="1"</b></tt>
+</pre>
+<pre class="SCREEN">
+    <tt class="PROMPT">ok</tt> <tt class=
+"USERINPUT"><b>boot</b></tt>
+</pre>
+            </li>
+
+            <li>
+              <p>Continue the installation as normal.</p>
+            </li>
+          </ol>
+        </div>
+
+        <p>The second part of the workaround takes place after
+        completing the CDROM installation (or a successful source
+        upgrade). It consists of configuring the <a href=
+        "http://www.FreeBSD.org/cgi/man.cgi?query=ata&sektion=4&manpath=FreeBSD+4.5-stable">
+        <span class="CITEREFENTRY"><span class=
+        "REFENTRYTITLE">ata</span>(4)</span></a> driver so that
+        future CDROM reads work correctly:</p>
+
+        <div class="PROCEDURE">
+          <ol type="1">
+            <li>
+              <p>Add the following two lines to <tt class=
+              "FILENAME">/boot/loader.conf</tt> (creating this file
+              if it does not already exist):</p>
+<pre class="PROGRAMLISTING">
+    hw.ata.ata_dma="1"
+    hw.ata.atapi_dma="1"
+</pre>
+            </li>
+
+            <li>
+              <p>Reboot the machine.</p>
+            </li>
+          </ol>
+        </div>
+
+        <p>As of this writing, this issue is under continuing
+        investigation.</p>
       </div>
     </div>
     <hr>