Date: Sun, 16 Sep 2012 11:23:03 +0200 From: "Julian H. Stacey" <jhs@berklix.com> To: Benjamin Kaduk <kaduk@mit.edu>, Yuri <yuri@rawbw.com> Cc: freebsd-hackers@freebsd.org, jhs@berklix.com Subject: Re: Why fdisk can't open root disk with MBR for writing? Message-ID: <201209160923.q8G9N3oJ085587@fire.js.berklix.net> In-Reply-To: Your message "Sat, 15 Sep 2012 14:49:41 EDT." <alpine.GSO.1.10.1209151448200.861@multics.mit.edu>
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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. Cheers, Julian -- Julian Stacey, BSD Unix Linux C Sys Eng Consultant, Munich http://berklix.com Reply below not above, like a play script. Indent old text with "> ". Send plain text. Not: HTML, multipart/alternative, base64, quoted-printable.
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