8.3-BETA1 installation problem

[Omer Faruk SEN]

I have done a simple

dd if=/dev/zero of=/dev/ad6 count=100 bs=1m which i think covers all. But
still no luck.

Regards.

On Fri, Feb 24, 2012 at 8:11 PM, Michael Powell <nightrecon at hotmail.com>wrote:

> Warren Block wrote:
>
> > On Fri, 24 Feb 2012, Omer Faruk SEN wrote:
> >
> >> Already done that but still habe the same issue. I can dd and sysctl but
> >> after installing without using W at disk label screen still no luck. I
> >> have also done
> >> sysctl kern.geom.debugflags=16 on fixit and restarted installation but
> >> still getting the same error.
> >
> > [Please don't top-post, it makes responding more difficult.]
> >
> >>> If you need to clear the old MBR the "old way", use a LiveFS or Fixit
> >>> shell and do this (as root):
> >>>
> >>> sysctl kern.geom.debugflags=16  and:
> >>>
> >>> dd if=/dev/zero of=/dev/adx oseek=1 bs=512 count=1
> >
> > The sysctl is not necessary.  The dd may not erase enough of the disk.
> > It will erase a bsdlabel, but not the MBR/PMBR.  As always, be warned
> > that this will erase the partition table on that disk, so make sure it's
> > the correct target disk and that you have full backups:
> >
> >    dd if=/dev/zero of=/dev/adX bs=512 count=34
>
>                ^^^^^^^^
> Excellent idea here. It covers GPT too, for as if a Linux distro was on the
> disk previously, or anything else using GPT. For me I only needed the one
> because my problem was only a change from FBSD 6.2 to 7.x something,
> no GPT involved - my problem was only disklabel related.
>
> > Replace X with the correct drive number.
>
>
>
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