Re: Can't change partition table anymore

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To: freebsd-current@freebsd.org
Date: Mon, 4 Apr 2005 11:07:36 +0930

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=16

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

-- 
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
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