From owner-freebsd-bugs@FreeBSD.ORG Sat Apr 12 21:50:05 2003 Return-Path: Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7D6F137B401 for ; Sat, 12 Apr 2003 21:50:05 -0700 (PDT) Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6F9F543FBD for ; Sat, 12 Apr 2003 21:50:04 -0700 (PDT) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.12.9/8.12.9) with ESMTP id h3D4o4Up027378 for ; Sat, 12 Apr 2003 21:50:04 -0700 (PDT) (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.12.9/8.12.9/Submit) id h3D4o4jE027377; Sat, 12 Apr 2003 21:50:04 -0700 (PDT) Resent-Date: Sat, 12 Apr 2003 21:50:04 -0700 (PDT) Resent-Message-Id: <200304130450.h3D4o4jE027377@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Brian Reid Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 35C7A37B401 for ; Sat, 12 Apr 2003 21:42:49 -0700 (PDT) Received: from dhcp3.waverley.reid.org (dhcp7.waverley.reid.org [192.147.236.157]) by mx1.FreeBSD.org (Postfix) with ESMTP id B975B43F93 for ; Sat, 12 Apr 2003 21:42:48 -0700 (PDT) (envelope-from reid@dhcp3.waverley.reid.org) Received: from dhcp3.waverley.reid.org (localhost [127.0.0.1]) h3C4gr8A003771 for ; Sat, 12 Apr 2003 05:42:54 +0100 (BST) (envelope-from reid@dhcp3.waverley.reid.org) Received: (from reid@localhost) by dhcp3.waverley.reid.org (8.12.8p1/8.12.8/Submit) id h3C4grP8003770; Sat, 12 Apr 2003 05:42:53 +0100 (BST) Message-Id: <200304120442.h3C4grP8003770@dhcp3.waverley.reid.org> Date: Sat, 12 Apr 2003 05:42:53 +0100 (BST) From: Brian Reid To: FreeBSD-gnats-submit@FreeBSD.org X-Send-Pr-Version: 3.113 Subject: i386/50887: MBR on kern.flp fails Compaq MBR validation on 4.5+ X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: Brian Reid List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 13 Apr 2003 04:50:05 -0000 >Number: 50887 >Category: i386 >Synopsis: MBR on kern.flp fails Compaq MBR validation on 4.5+ >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sat Apr 12 21:50:04 PDT 2003 >Closed-Date: >Last-Modified: >Originator: Brian Reid >Release: FreeBSD 4.8-RELEASE i386 >Organization: self >Environment: System: FreeBSD dhcp3.waverley.reid.org 4.8-RELEASE FreeBSD 4.8-RELEASE #0: Mon Mar 31 02:11:00 GMT 2003 root@freebsd-stable.sentex.ca:/usr/obj/usr/src/sys/GENERIC i386 Compaq Deskpro EN 733MHz Pentium III >Description: The floppy disk generated from floppies/kern.flp is not recognized as having a valid MBR unless the BIOS option "Verify MBR" is disabled. Earlier 2.* and 3.* boot.flp disks that I tested worked fine. 4.7 and 4.8 both fail. >How-To-Repeat: Get a Deskpro EN and try to boot from a floppy derived from kern.flp. It might fail on other Compaq models, too. >Fix: The right fix would be to figure out why the Compaq BIOS is rejecting the MBR on that disk, and make it look like a legal MBR. An obvious intermediate fix is to go into Setup and disable the "verify MBR" option under "Advanced". But I must confess I didn't figure that out until I had ripped the machine apart and added a CD ROM dangling by its IDE cable to do the actual install. >Release-Note: >Audit-Trail: >Unformatted: