9.2-RELEASE kernel ignores MBR on boot disk

Erich Dollansky erichsfreebsdlist at alogt.com
Sun Jan 12 14:08:45 UTC 2014


Hi,

On Sun, 12 Jan 2014 06:53:29 -0600
Scott Bennett <bennett at sdf.org> wrote:

> Erich Dollansky <erichsfreebsdlist at alogt.com> wrote:
> > On Sun, 12 Jan 2014 04:53:03 -0600
> > Scott Bennett <bennett at sdf.org> wrote:
> >
> > > Erich Dollansky <erichsfreebsdlist at alogt.com> wrote:
> > > 
> >  >
> > > > I only installed 9.2 once but did not face any problems with
> > > > MBR.
> > > >
> > >      Did your boot drive have a MBR on it?  Or a GPT label?
> > > 
> > it was also MBR and not GPT. But I made a fresh install and did not
> > do an upgrade via sources.
> >
>      Hmmm...  Did the stage 2 boot loader change in some important
> way for i386 between 8.x and 9.2?  I would not have thought that
> putting stuff into /dev would have depended upon anything in the
> loader.  Other than the loader, what else does installkernel leave
> unchanged? BTW, I just realized that I forgot to mention in my
> original message that the first 9.2-RELEASE kernel I tried was built
> with both
> 
I upgraded one machine from 8.x via sources to 10 around June/July 2012
without any problems.

> options		GEOM_PART_GPT
> 
> and
> 
> options		GEOM_PART_MBR
> 
> When that didn't work, I tried commenting out the first of those
> (GPT), which was the way I had had them in my 8.2-STABLE kernel.  The
> change made zero difference that I could see.  The messages at the
> point of failure were the same either way.

I have both on 10 and have no problems with it since I have both.

It all sounds weird to me. But you can use gpart to install the loaders
from 9.2 for a try. 

Erich
> 
> 
>                                   Scott Bennett, Comm. ASMELG, CFIAG
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