Can't change partition table anymore

[Andrey Chernov]

On Sun, Apr 03, 2005 at 11:41:13PM -0600, M. Warner Losh wrote:
> In message: <20050404053300.GA51088 at nagual.pp.ru>
>             Andrey Chernov <ache at nagual.pp.ru> writes:
> : On Sun, Apr 03, 2005 at 11:20:36PM -0600, M. Warner Losh wrote:
> : > One more time with -current machine:
> : 
> : I don't see any testing results from your side, just partition dump. To 
> : see them you need at least to restore standard MBR and with 'fdisk -u' 
> : change something not dangerous, like active partition flag, on /-mounted 
> : disk. The error will shown the end.
> 
> I thought you were trying to use boot0cfg.  boot0cfg changes the MBR,
> but does so through a safe ioctl.  I didn't try to change the
> partitioning of the disk itself.  If you are doing that, then you're
> seeing a design feature, and the changes of it changing are low.  This
> is a pain.

I was trying almost everything, fdisk, sysinstall and boot0cfg (don't 
trying dd).
fdisk & sysinstall not works until kern.geom.debugflags=16.
boot0cfg not works until I put freebsd bootloader inplace, it can't set 
active partition flag with other loaders. Even DOS utilities can.

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