Booting FreeBSD-5.3 from NTLDR

Loren M. Lang lorenl at
Mon Jan 31 02:11:57 PST 2005

On Mon, Jan 31, 2005 at 11:59:11AM +0400, Rakhesh Sasidharan wrote:
> > No, boot0 is just a normal file that is 512 bytes long.  There is
> > nothing special about it.  In it is a bootloader program that can be
> > used to boot FreeBSD, and if you run it during boot, it will read the
> > partition table and look for all OSes.  I think it will modify the
> > partition table, though, marking the last OS you booted into, but that's
> > the program running doing that, the file itself is harmless.
> Ok. I must have used some other command then, which resulted in my
> first disk MBR getting over-written ... strange. :-/
> By the way, does the fact that NTLDR is on my first disk, while
> FreeBSD (and hence its MBR boot0) is on my second disk complicate
> matters? I mean, you mention boot0 will modify my partition table to
> reflect which OS was booted last -- will it by any chance modify the
> partition table on the first disk and hence mess it?

You can disable this behavior of boot0 when you install the MBR on the
second disk using the "-o noupdate" argument to boot0cfg.

> -- 
> 				Rakhesh
> 				rax at

I sense much NT in you.
NT leads to Bluescreen.
Bluescreen leads to downtime.
Downtime leads to suffering.
NT is the path to the darkside.
Powerful Unix is.

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