Date: Sun, 16 Sep 2012 10:41:49 +0100 From: Chris Rees <crees@FreeBSD.org> To: "Julian H. Stacey" <jhs@berklix.com> Cc: Yuri <yuri@rawbw.com>, Benjamin Kaduk <kaduk@mit.edu>, freebsd-hackers@freebsd.org Subject: Re: Why fdisk can't open root disk with MBR for writing? Message-ID: <CADLo83_SWM1Be0Wy2c5A74D5rbfx4fKBNuEmzadaZxAR%2Bs-8TQ@mail.gmail.com> In-Reply-To: <201209160923.q8G9N3oJ085587@fire.js.berklix.net> References: <alpine.GSO.1.10.1209151448200.861@multics.mit.edu> <201209160923.q8G9N3oJ085587@fire.js.berklix.net>
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On 16 September 2012 10:23, Julian H. Stacey <jhs@berklix.com> wrote: > This is a resend as Benjamin Kaduk <kaduk@mit.edu> > dropped the > Yuri <yuri@rawbw.com> > from CC line, & Yuri was the original first poster in thread who > my patch would presumably have helped. > > Reference: >> From: Benjamin Kaduk <kaduk@mit.edu> >> Date: Sat, 15 Sep 2012 14:49:41 -0400 (EDT) >> Message-id: <alpine.GSO.1.10.1209151448200.861@multics.mit.edu> > > Benjamin Kaduk wrote: >> On Sat, 15 Sep 2012, Julian H. Stacey wrote: >> >> > I have been applying this diff to my man fdisk: >> > >> > http://berklix.com/~jhs/src/bsd/fixes/FreeBSD/src/gen/sbin/fdisk/ >> > >> > *** 8.0-RELEASE/src/sbin/fdisk/fdisk.8 Sat Mar 14 22:32:16 2009 >> > --- new-generic/src/sbin/fdisk/fdisk.8 Sat Mar 14 22:35:10 2009 >> > *************** >> > *** 462,464 **** >> > --- 462,468 ---- >> > The >> > .Xr bsdlabel 8 >> > command must be used for this. >> > + .Pp >> > + When running multi user, you cannot write unless you first run this: >> > + .br >> > + sysctl kern.geom.debugflags=16 >> > >> > I never submitted it as a send-pr, >> > anyone think I should submit it to help save people ? >> >> We have had a long discussion about kern.geom.debugflags starting here: >> http://lists.freebsd.org/pipermail/freebsd-current/2011-October/028090.html >> My understanding from that discussion is that your patch should not be >> accepted. > > Got to travel now, will read that thread later, > > A shame if we would leave fdisk crippled undocumented, when so easy > to doc. the solution. Fdisk is known across many OSs Unix & beyond, > our BSD tools may be better nicer, but fdisk it what many will first > reach for, > a shame not to help newer people & visitors used to fdisk. > We inside FreeBSD crippled fdisk by adding these flags. Outsiders > wont expect the weirdness & get impression FreeBSD has a bug. I think you have a point, but at the moment fdisk really doesn't work properly at all; I find so many people complaining on IRC about "Why doesn't fdisk work?" To be honest, I'd be happy with replacing fdisk with a huge warning "USE GPART!!"; fdisk isn't really standard anyway. The alternative of course is to fix fdisk... *properly*. Chris
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