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Subject: [RTFM response] Re: How to disable FreeBSD Boot Manager ?
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Edy Lie <email@edylie.net> writes:

> I would like to revert to regular boot instead of using the Boot
> Manager.
> 
> Any idea ?

It's in the FAQ.


       To return a ``dangerously dedicated'' disk for normal PC use, there are
       basically two options. The first is, you write enough NULL bytes over the
       MBR to make any subsequent installation believe this to be a blank disk.
       You can do this for example with

     # dd if=/dev/zero of=/dev/rda0 count=15

       Alternatively, the undocumented DOS ``feature''

     C:\> fdisk /mbr

       will to install a new master boot record as well, thus clobbering the BSD
       bootstrap.