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Date:      Sun, 22 Aug 1999 13:49:42 -0700 (PDT)
From:      Tom <tom@uniserve.com>
To:        Brandon Fosdick <bfoz@glue.umd.edu>
Cc:        Mike Smith <mike@smith.net.au>, freebsd-stable@FreeBSD.ORG
Subject:   Re: Dual Boot on a 20GB HDD? 
Message-ID:  <Pine.BSF.4.02A.9908221346570.7373-100000@shell.uniserve.ca>
In-Reply-To: <001201beecce$02f0b4a0$63dc0281@umd.edu>

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On Sun, 22 Aug 1999, Brandon Fosdick wrote:

> > > System: PIII-600 128MB RAM 20GB HDD on an Asus P3B-F mboard
> > > OS's: Win98, FBSD 3.2-R
> > >
> > > I already have two dos slices that take up the first 15GB of the drive
> so I
> > > tried installing FBSD at the end of the disk. The installation went fine
> but
> > > it won't boot into FBSD. When I hit F3 at boot-up to select FBSD I get a
> > > console beep and nothing happens. Hitting the F1 key takes it right into
> > > windoze w/o any problems.  I've already tried updating the BIOS on the
> > > mboard. Is there a limitation in FBSD (or BootMgr) that prevents booting
> to
> > > a slice at the 15GB point?
> >
> > This is a BIOS limitation; you can't (easily) boot anything beyond the
> > 1024 cylinder limit.
> 
> My old machine booted from somewhere in the 14000's. It had a BIOS from
> 1997. This new machine has a BIOS from 8/17/99. That's why I think this has
> something to do with FBSD. I sent a message to Asus just to make sure it's
> not a problem with the BIOS.

  Definitely not.  If you use LBA, cylinders are re-mapped.  If you use
LARGE, they are not.  The BIOS can't easy boot anything beyond 1024
cylinders.  If you use LBA, that means you can boot FBSD within the 8.4GB
limit.  I don't think it is possible to boot anything beyond 8.4GB.

Tom



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