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Date:      Thu, 27 Jul 2000 11:45:11 -0700 (MST)
From:      John Reynolds <jjreynold@home.com>
To:        hackers@freebsd.org
Subject:   Re: unable to use disklabel -B from fixit floppy?
Message-ID:  <14720.33591.77038.377961@whale.home-net>
In-Reply-To: <200007271636.JAA76849@pike.osd.bsdi.com>
References:  <14719.60144.794393.763015@gargle.gargle.HOWL> <200007271636.JAA76849@pike.osd.bsdi.com>

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[ copying -doc because I've got a doc patch for the FAQ ... perhaps :) ]

[ On Thursday, July 27, John Baldwin wrote: ]
> 
> Umm, well.  First off, disklabel -B doesn't fix your MBR.  fdisk does that,
> or boot0cfg if you are using boot0 to dual-boot.  However, can you type

Hmmm. Must have just been bit-rot in my brain from WAY back. Maybe it was the
3.x to 4.x transition where I remember seeing ``do disklabel -B'' ... can't
remember. OK, now I know boot0cfg so I'll remember that. Thanks very much!

> disklabel ad0 now and get useful information?  Or disklabel ad0sX (where X
> is the slice number for your FreeBSD slice)?

oh yes, no problems.

> Yes, this touches the MBR.  The disklabel command serves the same purpose as
> the label editor in sysinstall.  IOW, you use disklabel to lay out partitions
> (a-h) within a FreeBSD slice.
> 
> See if disklabel ad0 works now.

Absolutely. Since this is a way to recover the MBR in addition to what was
already in the FAQ, I hacked up some changes to that FAQ entry. Attached is a
diff--be gentle, this is my very first time attempting to hack SGML :) ...

(I will go ahead and just send-pr this as well ....)

--- book.sgml.orig	Thu Jul 27 11:08:53 2000
+++ book.sgml	Thu Jul 27 11:38:03 2000
@@ -1306,22 +1306,22 @@
 </answer></qandaentry>
 
 <qandaentry><question>
-<para>Can Windows 95 co-exist with FreeBSD?</para></question><answer>
+<para>Can Windows 95/98 co-exist with FreeBSD?</para></question><answer>
 
-<para>Install Windows 95 first, after that FreeBSD. FreeBSD's boot
-manager will then manage to boot Win95 and FreeBSD.  If you
-install Windows 95 second, it will boorishly overwrite your
+<para>Install Windows 95/98 first, after that FreeBSD. FreeBSD's boot
+manager will then manage to boot Win95/98 and FreeBSD.  If you
+install Windows 95/98 second, it will boorishly overwrite your
 boot manager without even asking.  If that happens, see
 the next section.</para>
 
 </answer></qandaentry>
 
 <qandaentry><question>
-<para>        Windows 95 killed my boot manager!  How do I get it back?
+<para>        Windows 95/98 killed my boot manager!  How do I get it back?
       </para></question><answer>
 
 <para>You can reinstall the boot manager FreeBSD comes with in one of
-two ways:</para>
+three ways:</para>
 
 
 <itemizedlist>
@@ -1351,6 +1351,24 @@
 prompt, be sure to select "Boot Manager."
 This will re-write the boot manager to disk.  Now quit out of the
 installation menu and reboot off the hard disk as normal.</para>
+</listitem>
+
+<listitem>
+<para>Boot the FreeBSD boot floppy (or CD-ROM) and choose the 
+<quote>Fixit</quote> menu item. Select either the Fixit floppy or 
+CD-ROM #2 (the <quote>live</quote> file system option) as appropriate
+and enter the fixit shell. Then execute the following command:
+</para>
+
+<screen><prompt>Fixit# </prompt> <userinput>boot0cfg -B bootdevice </userinput></screen>
+<para></para>
+
+<para>substituting <quote>bootdevice</quote> for your real boot device such
+as ad0 (first IDE disk), ad4 (first IDE disk on auxiliary controller), da0
+(first SCSI disk), etc.
+
+</para>
+
 </listitem>
 
 </itemizedlist>

-- 
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
John Reynolds         Chandler Capabilities Engineering, CDS, Intel Corporation
jreynold@sedona.ch.intel.com  My opinions are mine, not Intel's. Running
jjreynold@home.com          FreeBSD 4.0-STABLE. FreeBSD: The Power to Serve.
http://members.home.com/jjreynold/  Come join us!!! @ http://www.FreeBSD.org/
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


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