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From: Sam Lawrance <boris@brooknet.com.au>
To: Andrey Chernov <ache@nagual.pp.ru>
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Date: Mon, 04 Apr 2005 10:16:46 -0500
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cc: current@freebsd.org
Subject: Re: Can't change partition table anymore
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On Mon, 2005-04-04 at 03:42 +0400, Andrey Chernov wrote:
> On Mon, Apr 04, 2005 at 03:38:53AM +0400, 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
> 
> BTW, only fdisk works after that change, sysinstall continue to say
> ERROR: Unable to write data to disk ad0!
> I suspect more FWRITEs hidden somewhere...

Any part of ad0 mounted rw? I think you can't do it when that's the
case.