From owner-freebsd-hackers@FreeBSD.ORG Sun Sep 16 09:23:46 2012 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D93881065679 for ; Sun, 16 Sep 2012 09:23:46 +0000 (UTC) (envelope-from jhs@berklix.com) Received: from tower.berklix.org (tower.berklix.org [83.236.223.114]) by mx1.freebsd.org (Postfix) with ESMTP id 486438FC0C for ; Sun, 16 Sep 2012 09:23:45 +0000 (UTC) Received: from mart.js.berklix.net (pD9FBEF1A.dip.t-dialin.net [217.251.239.26]) (authenticated bits=0) by tower.berklix.org (8.14.2/8.14.2) with ESMTP id q8G9NgD7041409; Sun, 16 Sep 2012 09:23:43 GMT (envelope-from jhs@berklix.com) Received: from fire.js.berklix.net (fire.js.berklix.net [192.168.91.41]) by mart.js.berklix.net (8.14.3/8.14.3) with ESMTP id q8G9NYnr021540; Sun, 16 Sep 2012 11:23:34 +0200 (CEST) (envelope-from jhs@berklix.com) Received: from fire.js.berklix.net (localhost [127.0.0.1]) by fire.js.berklix.net (8.14.4/8.14.4) with ESMTP id q8G9N3oJ085587; Sun, 16 Sep 2012 11:23:09 +0200 (CEST) (envelope-from jhs@fire.js.berklix.net) Message-Id: <201209160923.q8G9N3oJ085587@fire.js.berklix.net> To: Benjamin Kaduk , Yuri From: "Julian H. Stacey" Organization: http://berklix.com BSD Unix Linux Consultancy, Munich Germany User-agent: EXMH on FreeBSD http://berklix.com/free/ X-URL: http://www.berklix.com In-reply-to: Your message "Sat, 15 Sep 2012 14:49:41 EDT." Date: Sun, 16 Sep 2012 11:23:03 +0200 Sender: jhs@berklix.com Cc: freebsd-hackers@freebsd.org, jhs@berklix.com Subject: Re: Why fdisk can't open root disk with MBR for writing? X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 16 Sep 2012 09:23:46 -0000 This is a resend as Benjamin Kaduk dropped the Yuri from CC line, & Yuri was the original first poster in thread who my patch would presumably have helped. Reference: > From: Benjamin Kaduk > Date: Sat, 15 Sep 2012 14:49:41 -0400 (EDT) > Message-id: 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.