Date: Sat, 12 Apr 2003 05:42:53 +0100 (BST) From: Brian Reid <brian@reid.org> To: FreeBSD-gnats-submit@FreeBSD.org Subject: i386/50887: MBR on kern.flp fails Compaq MBR validation on 4.5+ Message-ID: <200304120442.h3C4grP8003770@dhcp3.waverley.reid.org> Resent-Message-ID: <200304130450.h3D4o4jE027377@freefall.freebsd.org>
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>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:
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