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Date:      Wed, 12 May 1999 17:06:03 -0700
From:      Mike Smith <mike@smith.net.au>
To:        John-Mark Gurney <gurney_j@resnet.uoregon.edu>
Cc:        Mike Smith <mike@smith.net.au>, freebsd-current@FreeBSD.ORG
Subject:   Re: the new config and booting 
Message-ID:  <199905130006.RAA02337@dingo.cdrom.com>
In-Reply-To: Your message of "Wed, 12 May 1999 16:59:06 PDT." <19990512165906.57576@hydrogen.nike.efn.org> 

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> Mike Smith scribbled this message on May 12:
> > > 
> > > no, it's a "dangerously dedicated" SCSI disk.
> > 
> > That's never a good start.
> 
> well, I wonder if other people have noticed this also, but if you don't
> have a previous boot loader installed (like windows/dos) the ONLY way
> to install onto a machine is TO use a dangerously dedicated mode...

This is quite untrue.   I do a lot of installs to virgin systems on a 
wide range of hardware, and I haven't encountered any situations where 
DD has been necessary in a long time.  OTOH, I have met many where DD 
would be fatal.

> I did a couple installs using normal slices and standard MBR, and when
> the machine restarted, I got the "Operating System Missing" error...
> the only way I was able to install on the system was to use dangerous
> dedicated mode...  I've seen this happen a couple times w/ 3.0-R and
> 3.1-19990328-STABLE IIRC...

The determining factors here are the BIOS on your system and the
geometries that you've set for them in your system's setup.  If you
manually match the system geometry to the BSD geometry, or your BIOS is
smart enough to check the disk geometry and match it, you'll be fine.

-- 
\\  Sometimes you're ahead,       \\  Mike Smith
\\  sometimes you're behind.      \\  mike@smith.net.au
\\  The race is long, and in the  \\  msmith@freebsd.org
\\  end it's only with yourself.  \\  msmith@cdrom.com




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