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Date:      Mon, 16 Aug 2010 20:14:32 +0200
From:      Roland Smith <rsmith@xs4all.nl>
To:        Dick Hoogendijk <dick@nagual.nl>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: ZFS not usable on FreeBSD-8.1
Message-ID:  <20100816181432.GA66710@slackbox.erewhon.net>
In-Reply-To: <1281947758890646500@nagual.nl>
References:  <4C669668.5040906@nagual.nl> <19558.60756.860555.968721@gargle.gargle.HOWL> <4C66F542.6090501@nagual.nl> <19559.15997.480750.380264@gargle.gargle.HOWL> <4C6835B9.7000900@nagual.nl> <AANLkTi=fYtMYLeWgM8JZdECbv8EfkVSQcoSeFyLsOGXK@mail.gmail.com> <1281947758890646500@nagual.nl>

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On Mon, Aug 16, 2010 at 10:35:58AM +0200, Dick Hoogendijk wrote:
> On Mon, Aug 16, 2010 04:49  AM, Adam Vande More <amvandemore@gmail.com> w=
rote:
> > On Sun, Aug 15, 2010 at 1:45 PM, Dick Hoogendijk <dick@nagual.nl> wrote:
> > > My 500Gb drives won't however. they keep on giving cg); bad magic num=
ber.
> > > Sysinstall won't newfs the drives. newfs -U /dev/gm1a (created with t=
he
> > > script mentioned before does not work OK either. Always this unexplai=
ned
> > > message (cg0: bad magic number). I have NO CLUE whatsoever what can b=
e the
> > > cause of this. Both drives can be formatted by Windows, Linux and lot=
s of
> > > other utilities. They can not be formatted UFS2 for / by FreeBSD-8.1/=
amd64
> >=20
> > You can try to get your system up and running using something like
> > http://mfsbsd.vx.sk/ or pcbsd.  If that works, then I guess the possible
> > cause is you. :-)
>=20
> Good idea. I will give it a shot, although I'm pretty sure I'm not the
> cause.  I have four years experience as a (Open)Solaris system administra=
tor
> and before that I used FreeBSD heavely. From the 4.10 series up to the 6.x
> series. So I do know something about the matter. But, we'll see... Keep y=
ou
> posted.

It could be that newfs is overwriting the partition table.
Can you post the output of 'gpart show <device>' and 'bsdlabel <device>s1'?

Roland
--=20
R.F.Smith                                   http://www.xs4all.nl/~rsmith/
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