From owner-freebsd-questions Fri Apr 5 22:23:33 2002 Delivered-To: freebsd-questions@freebsd.org Received: from mired.org (dsl-64-192-6-133.telocity.com [64.192.6.133]) by hub.freebsd.org (Postfix) with SMTP id 038F337B416 for ; Fri, 5 Apr 2002 22:23:23 -0800 (PST) Received: (qmail 82411 invoked by uid 100); 6 Apr 2002 06:23:19 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15534.37975.375788.408446@guru.mired.org> Date: Sat, 6 Apr 2002 00:23:19 -0600 To: Peter Leftwich Cc: FreeBSD Questions Subject: Re: MBR, mfsroot.flp, handbook, and list fail me! In-Reply-To: <20020406010330.M72615-100000@earl-grey.cloud9.net> References: <15534.35499.959649.111092@guru.mired.org> <20020406010330.M72615-100000@earl-grey.cloud9.net> X-Mailer: VM 6.90 under 21.1 (patch 14) "Cuyahoga Valley" XEmacs Lucid X-face: "5Mnwy%?j>IIV\)A=):rjWL~NB2aH[}Yq8Z=u~vJ`"(,&SiLvbbz2W`;h9L,Yg`+vb1>RG% *h+%X^n0EZd>TM8_IB;a8F?(Fb"lw'IgCoyM.[Lg#r\ From: Mike Meyer X-Delivery-Agent: TMDA/0.51 (Python 2.2 on FreeBSD/i386) Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG In <20020406010330.M72615-100000@earl-grey.cloud9.net>, Peter Leftwich typed: > On Fri, 5 Apr 2002, Mike Meyer wrote: > > > Is it possible to boot to 4.5-RELEASE floppies, start a fixit holographic shell (aggravation city, frustration state, 01010) and do a similar FreeBSD fdisk or mbr command? Thanks for your continued help on this issue, > > On FreeBSD, the equivalent of "fdisk /mbr" is "fdisk -B", or maybe "fdisk -B ad0". > Okay, shweeeet, (now I remember seeing boot0cfg(8) somewhere!) But this > has confy-yoositt me slightly in these two regards, [A] What the heck is > /boot/mbr file? [B] is it some kind of symlink to the actual MBR of my HD? > and [C] Must the user boot to floppies, or can the user boot normally and > SAFELY change the MBR (preferably via /stand/sysinstall while logged in as > root)? /boot/mbr is a *copy* of the bootcode. It's installed by fdisk if you don't specify other code to install with the -b option. boot0cfg installs and configures the FreeBSD boot manager for multiboot systems, a copy of which is in /boot/boot0. You can use either one after booting normally. In fact, you can use them while the system is running multiuser. http://www.mired.org/home/mwm/ Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message