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Date:      Mon, 7 Jun 2004 10:46:48 -0700 (PDT)
From:      Doug White <dwhite@gumbysoft.com>
To:        Joan Picanyol <lists-freebsd-current@biaix.org>
Cc:        "'freebsd-current@freebsd.org'" <freebsd-current@freebsd.org>
Subject:   Re: Sysinstall & labels/fdisk
Message-ID:  <20040607104535.T19466@carver.gumbysoft.com>
In-Reply-To: <20040607171612.GA86565@grummit.biaix.org>
References:  <FE045D4D9F7AED4CBFF1B3B813C8533703FFC22D@mail.sandvine.com> <20040607171612.GA86565@grummit.biaix.org>

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On Mon, 7 Jun 2004, Joan Picanyol wrote:

> * Alex Hoff <ahoff@sandvine.com> [20040607 16:47]:
> > I have run in to an odd problem that on a freebsd 5.2 current system after
> > running fdisk and disklabel the initial time on install, i am never allowed
> > to do it again.
> >
> > What I have tried on many different systems, is to run sysinstall, and
> > either run fdisk or label. After making a change and trying to write the
> > changes, it will fail. Even if you dont make a change, and just try to write
> > the current settings to the disk, it will fail. The following error comes up
> > "ERROR: Unable to write data to disk ad0" (if also tried different types of
> > disk devices - da/aacd). Ktrace shows the error as "errno 1 Operation not
> > permitted"
>
> GEOM won't let you touch MBR/slices/partitions on used devices. For it
> to allow footshooting you should set kern.geom.debugflags=16

Be REALLY careful with this!  I have a documented case of te device
entries getting confused and blowing away the wrong partition. I STRONGLY
recommend AGAINST using this flag.

Make backups, we are not responsible, etc. etc. etc.

-- 
Doug White                    |  FreeBSD: The Power to Serve
dwhite@gumbysoft.com          |  www.FreeBSD.org



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