Undo MBR

[Paul Murphy]

On Thu, 4 Sep 2003 13:11:25 +0100
Matthew Seaman <m.seaman at infracaninophile.co.uk> wrote:

> On Wed, Sep 03, 2003 at 06:00:30PM -0500, David Kelly wrote:
> > On Wednesday 03 September 2003 05:13 pm, Paul Murphy wrote:
> > >  I have just installed FBSD-CURRENT on a test box. During install
> > >  I
> > > unwittingly installed a BootMgr entry for the second HDD (it will
> > > just be a data disk, no need to boot from it).
> > >
> > >  If I do 'dd if=/dev/zero of=/dev/rad2 count=15' will this "erase"
> > > the BootMgr or will I have to redo Fdisk and etcetera. There is no
> > > data on the disk yet so this would be no hardship, but is there a
> > > "proper" way of doing what I want?
> > >
> > >
> > >  Just to clarify, upon booting I get:
> > >
> > > 	F1 FreeBSD
> > > 	F5 Drive 1
> > >
> > >  but I just want to boot straight into FreeBSD, no "dual-boot".
> > 
> > I don't know why you are fretting about this prompt and momentarily 
> > pause in the boot process. Also think you are confused about the MBR
> > thing on the 2nd drive.
> > 
> > The prompt above is coming from your first HD. If the BIOS did not
> > know about the 2nd drive the F5 entry would not be there and the
> > FreeBSD F1 entry would still be there. You could hide this prompt by
> > retuning the MBR to pause 0 or 1 seconds. Zero might be infinite.
> > 
> > To eliminate the prompt, wipe the HD and reinstall "dangerously 
> > dedicated." The result will be a disk which lacks the headers which 
> > allows other x86 OS's to understand what/how the disk is used.
> 
> Errr... That's a little excessive.  The quick way to remove the
> FreeBSd boot manager and restore a standard MBR is:
> 
>     # boot0cfg -B -b /boot/mbr ad0
> 
> (The OP might want to do that on his data disk ad2 as well).  No
> changes to the filesystems on those disks should be necessary.
> 

 THAT'S what I was looking for! I knew it should have something to do
with boot0cfg, just didn't read the man page closely enough I guess.

-- 
Cogeco ergo sum
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