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Date:      Mon, 4 Apr 2005 11:07:36 +0930
From:      "Daniel O'Connor" <doconnor@gsoft.com.au>
To:        freebsd-current@freebsd.org
Cc:        current@freebsd.org
Subject:   Re: Can't change partition table anymore
Message-ID:  <200504041107.42147.doconnor@gsoft.com.au>
In-Reply-To: <20050403233852.GA45951@nagual.pp.ru>
References:  <20050403232027.GA42574@nagual.pp.ru> <20050403233852.GA45951@nagual.pp.ru>

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On Mon, 4 Apr 2005 09:08, Andrey Chernov wrote:
> On Mon, Apr 04, 2005 at 03:20:27AM +0400, Andrey Chernov wrote:
> > Recent -current says "Operation not permitted" for both fdisk and
> > sysinstall partition changes (under su root). Something wrong happens
> > with DIOCSMBR. Plain ATA disk ad0. Any ideas?
>
> When I comment out this two lines in geom_mbr.c, it works again as before:
>                 //if (!(fflag & FWRITE))
>                 //        return (EPERM);
> It means something is wrong with FWRITE flag settings. Device itself is
> writeable:
> crw-r-----  1 root  operator    8,  66 Apr  4 03:33 /dev/ad0

If you have part of that device open GEOM won't let you touch the MBR..
You can turn the foot-shooting prevention off by doing..

sysctl kern.geom.debugflags=3D16

Make sure you set it back to 0 after you're done.

=2D-=20
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C

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