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Date:      Mon, 20 Dec 2004 21:57:58 -0800 (PST)
From:      "Roger L. Beeman" <rlb@subako.org>
To:        freebsd-stable@FreeBSD.org
Subject:   Re: 5.3 Loader Too Fragile
Message-ID:  <200412210557.iBL5vwNB026690@suna.subako.org>
In-Reply-To: <200412022323.iB2NN4rV097050@suna.subako.org> (message from Roger L. Beeman on Thu, 2 Dec 2004 15:23:04 -0800 (PST))

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I have done the binary search for the origin of the "desupport" of my
440LX dual CPU DEC Personal Workstation Station 333i+ with no IDE
devices; CD and HD are SCSI on 2940U2W controller. 

Can someone explain how a module that is not built into my custom
kernel can have the effect of blowing the loader into a "I can't
keep track of squat" fit?

Roger L. Beeman

==> Here is the logfile of the cvsup
  from tag=. date=2004.08.16.15.20.00 to tag=. date=2004.08.16.15.25.00

Updating collection src-all/cvs
 Edit src/sys/modules/cbb/Makefile
  Add delta 1.9 2004.08.16.15.23.10 imp
  Add delta 1.10 2004.08.16.15.24.03 imp

==> Here is my kernel config file

#
# Iyaki -- Custom kernel configuration file for FreeBSD/i386
#
# For more information on this file, please read the handbook section on
# Kernel Configuration Files:
#
#    http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/kernelco
nfig-config.html
#
# The handbook is also available locally in /usr/share/doc/handbook
# if you've installed the doc distribution, otherwise always see the
# FreeBSD World Wide Web server (http://www.FreeBSD.org/) for the
# latest information.
#
# An exhaustive list of options and more detailed explanations of the
# device lines is also present in the ../../conf/NOTES and NOTES files.
# If you are in doubt as to the purpose or necessity of a line, check f
irst
# in NOTES.
#
# $FreeBSD: src/sys/i386/conf/GENERIC,v 1.413 2004/08/11 01:34:18 rwats
on Exp $

machine		i386
#cpu		I486_CPU
#cpu		I586_CPU
cpu		I686_CPU
options 	CPU_DISABLE_SSE
ident		Iyaki

# To statically compile in device wiring instead of /boot/device.hints
#hints		"GENERIC.hints"		# Default places to look for de
vices.

#makeoptions	DEBUG=-g		# Build kernel with gdb(1) debu
g symbols

options 	SCHED_ULE		# ULE scheduler
options 	INET			# InterNETworking
#options 	INET6			# IPv6 communications protocols
options 	FFS			# Berkeley Fast Filesystem
options 	SOFTUPDATES		# Enable FFS soft updates suppo
rt
options 	UFS_ACL			# Support for access control li
sts
options 	UFS_DIRHASH		# Improve performance on big di
rectories
options 	MD_ROOT			# MD is a potential root device
#options 	NFSCLIENT		# Network Filesystem Client
#options 	NFSSERVER		# Network Filesystem Server
#options 	NFS_ROOT		# NFS usable as /, requires NFS
CLIENT
options 	MSDOSFS			# MSDOS Filesystem
options 	CD9660			# ISO 9660 Filesystem
options 	PROCFS			# Process filesystem (requires 
PSEUDOFS)
options 	PSEUDOFS		# Pseudo-filesystem framework
options 	GEOM_GPT		# GUID Partition Tables.
options 	COMPAT_43		# Compatible with BSD 4.3 [KEEP
 THIS!]
options 	COMPAT_FREEBSD4		# Compatible with FreeBSD4
options 	SCSI_DELAY=2000	# Delay (in ms) before probing SCSI
options 	KTRACE			# ktrace(1) support
options 	SYSVSHM			# SYSV-style shared memory
options 	SYSVMSG			# SYSV-style message queues
options 	SYSVSEM			# SYSV-style semaphores
options 	_KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time 
extensions
options 	KBD_INSTALL_CDEV	# install a CDEV entry in /dev
options 	AHC_REG_PRETTY_PRINT	# Print register bitfields in d
ebug
					# output.  Adds ~128k to driver.
#options 	AHD_REG_PRETTY_PRINT	# Print register bitfields in d
ebug
					# output.  Adds ~215k to driver.
options 	PFIL_HOOKS		# pfil(9) framework
options 	ADAPTIVE_GIANT		# Giant mutex is adaptive.

# Debugging for use in -current
#options 	KDB			# Enable kernel debugger suppor
t.
#options 	DDB			# Support DDB.
#options 	GDB			# Support remote GDB.
#options 	INVARIANTS		# Enable calls of extra sanity 
checking
#options 	INVARIANT_SUPPORT	# Extra sanity checks of intern
al structures, required by INVARIANTS
#options 	WITNESS			# Enable checks to detect deadl
ocks and cycles
#options 	WITNESS_SKIPSPIN	# Don't run witness on spinlock
s for speed

# To make an SMP kernel, the next two are needed
options 	SMP		# Symmetric MultiProcessor Kernel
device		apic		# I/O APIC

# Bus support.  Do not remove isa, even if you have no isa slots
device		isa
device		eisa
device		pci

# Floppy drives
device		fdc

# ATA and ATAPI devices
#device		ata
#device		atadisk		# ATA disk drives
#device		ataraid		# ATA RAID drives
#device		atapicd		# ATAPI CDROM drives
#device		atapifd		# ATAPI floppy drives
#device		atapist		# ATAPI tape drives
#options 	ATA_STATIC_ID	# Static device numbering

# SCSI Controllers
#device		ahb		# EISA AHA1742 family
device		ahc		# AHA2940 and onboard AIC7xxx devices
#device		ahd		# AHA39320/29320 and onboard AIC79xx de
vices
#device		amd		# AMD 53C974 (Tekram DC-390(T))
#device		isp		# Qlogic family
#device		mpt		# LSI-Logic MPT-Fusion
#device		ncr		# NCR/Symbios Logic
#device		sym		# NCR/Symbios Logic (newer chipsets + t
hose of `ncr')
#device		trm		# Tekram DC395U/UW/F DC315U adapters

#device		adv		# Advansys SCSI adapters
#device		adw		# Advansys wide SCSI adapters
#device		aha		# Adaptec 154x SCSI adapters
#device		aic		# Adaptec 15[012]x SCSI adapters, AIC-6
[23]60.
#device		bt		# Buslogic/Mylex MultiMaster SCSI adapt
ers

#device		ncv		# NCR 53C500
#device		nsp		# Workbit Ninja SCSI-3
#device		stg		# TMC 18C30/18C50

# SCSI peripherals
device		scbus		# SCSI bus (required for SCSI)
device		ch		# SCSI media changers
device		da		# Direct Access (disks)
device		sa		# Sequential Access (tape etc)
device		cd		# CD
device		pass		# Passthrough device (direct SCSI acces
s)
device		ses		# SCSI Environmental Services (and SAF-
TE)

# RAID controllers interfaced to the SCSI subsystem
#device		amr		# AMI MegaRAID
#device		asr		# DPT SmartRAID V, VI and Adaptec SCSI 
RAID
#device		ciss		# Compaq Smart RAID 5*
#device		dpt		# DPT Smartcache III, IV - See NOTES fo
r options
#device		iir		# Intel Integrated RAID
#device		ips		# IBM (Adaptec) ServeRAID
#device		mly		# Mylex AcceleRAID/eXtremeRAID
#device		twa		# 3ware 9000 series PATA/SATA RAID

# RAID controllers
#device		aac		# Adaptec FSA RAID
#device		aacp		# SCSI passthrough for aac (requires CA
M)
#device		ida		# Compaq Smart RAID
#device		mlx		# Mylex DAC960 family
#device		pst		# Promise Supertrak SX6000
#device		twe		# 3ware ATA RAID

# atkbdc0 controls both the keyboard and the PS/2 mouse
device		atkbdc		# AT keyboard controller
device		atkbd		# AT keyboard
device		psm		# PS/2 mouse

device		vga		# VGA video card driver

device		splash		# Splash screen and screen saver support

# syscons is the default console driver, resembling an SCO console
device		sc

# Enable this for the pcvt (VT220 compatible) console driver
#device		vt
#options 	XSERVER		# support for X server on a vt console
#options 	FAT_CURSOR	# start with block cursor

device		agp		# support several AGP chipsets

# Floating point support - do not disable.
device		npx

# Power management support (see NOTES for more options)
#device		apm
# Add suspend/resume support for the i8254.
device		pmtimer

# PCCARD (PCMCIA) support
# PCMCIA and cardbus bridge support
#device		cbb		# cardbus (yenta) bridge
#device		pccard		# PC Card (16-bit) bus
#device		cardbus		# CardBus (32-bit) bus

# Serial (COM) ports
device		sio		# 8250, 16[45]50 based serial ports

# Parallel port
device		ppc
device		ppbus		# Parallel port bus (required)
device		lpt		# Printer
#device		plip		# TCP/IP over parallel
device		ppi		# Parallel port interface device
#device		vpo		# Requires scbus and da

# If you've got a "dumb" serial or parallel PCI card that is
# supported by the puc(4) glue driver, uncomment the following
# line to enable it (connects to the sio and/or ppc drivers):
#device         puc

# PCI Ethernet NICs.
device		de		# DEC/Intel DC21x4x (``Tulip'')
device		em		# Intel PRO/1000 adapter Gigabit Ethern
et Card
#device		ixgb		# Intel PRO/10GbE Ethernet Card
#device		txp		# 3Com 3cR990 (``Typhoon'')
#device		vx		# 3Com 3c590, 3c595 (``Vortex'')

# PCI Ethernet NICs that use the common MII bus controller code.
# NOTE: Be sure to keep the 'device miibus' line in order to use these 
NICs!
device		miibus		# MII bus support
#device		bfe		# Broadcom BCM440x 10/100 Ethernet
#device		bge		# Broadcom BCM570xx Gigabit Ethernet
device		dc		# DEC/Intel 21143 and various workalikes
device		fxp		# Intel EtherExpress PRO/100B (82557, 8
2558)
#device		pcn		# AMD Am79C97x PCI 10/100 (precedence o
ver 'lnc')
#device		re		# RealTek 8139C+/8169/8169S/8110S
#device		rl		# RealTek 8129/8139
#device		sf		# Adaptec AIC-6915 (``Starfire'')
#device		sis		# Silicon Integrated Systems SiS 900/Si
S 7016
#device		sk		# SysKonnect SK-984x & SK-982x gigabit 
Ethernet
#device		ste		# Sundance ST201 (D-Link DFE-550TX)
#device		ti		# Alteon Networks Tigon I/II gigabit Et
hernet
#device		tl		# Texas Instruments ThunderLAN
#device		tx		# SMC EtherPower II (83c170 ``EPIC'')
#device		vr		# VIA Rhine, Rhine II
#device		wb		# Winbond W89C840F
#device		xl		# 3Com 3c90x (``Boomerang'', ``Cyclone'
')

# ISA Ethernet NICs.  pccard NICs included.
#device		cs		# Crystal Semiconductor CS89x0 NIC
# 'device ed' requires 'device miibus'
#device		ed		# NE[12]000, SMC Ultra, 3c503, DS8390 c
ards
#device		ex		# Intel EtherExpress Pro/10 and Pro/10+
#device		ep		# Etherlink III based cards
#device		fe		# Fujitsu MB8696x based cards
#device		ie		# EtherExpress 8/16, 3C507, StarLAN 10 
etc.
#device		lnc		# NE2100, NE32-VL Lance Ethernet cards
#device		sn		# SMC's 9000 series of Ethernet chips
#device		xe		# Xircom pccard Ethernet

# ISA devices that use the old ISA shims
#device		le

# Wireless NIC cards
#device		wlan		# 802.11 support
#device		an		# Aironet 4500/4800 802.11 wireless NIC
s.
#device		awi		# BayStack 660 and others
#device		wi		# WaveLAN/Intersil/Symbol 802.11 wirele
ss NICs.
#device		wl		# Older non 802.11 Wavelan wireless NIC.

# Pseudo devices.
device		loop		# Network loopback
device		mem		# Memory and kernel memory devices
device		io		# I/O device
device		random		# Entropy device
device		ether		# Ethernet support
#device		sl		# Kernel SLIP
device		ppp		# Kernel PPP
device		tun		# Packet tunnel.
device		pty		# Pseudo-ttys (telnet etc)
device		md		# Memory "disks"
#device		gif		# IPv6 and IPv4 tunneling
#device		faith		# IPv6-to-IPv4 relaying (translation)

# The `bpf' device enables the Berkeley Packet Filter.
# Be aware of the administrative consequences of enabling this!
device		bpf		# Berkeley packet filter

# USB support
device		uhci		# UHCI PCI->USB interface
device		ohci		# OHCI PCI->USB interface
device		usb		# USB Bus (required)
#device		udbp		# USB Double Bulk Pipe devices
device		ugen		# Generic
device		uhid		# "Human Interface Devices"
device		ukbd		# Keyboard
device		ulpt		# Printer
device		umass		# Disks/Mass storage - Requires scbus a
nd da
device		ums		# Mouse
#device		urio		# Diamond Rio 500 MP3 player
device		uscanner	# Scanners
# USB Ethernet, requires mii
#device		aue		# ADMtek USB Ethernet
#device		axe		# ASIX Electronics USB Ethernet
#device		cue		# CATC USB Ethernet
#device		kue		# Kawasaki LSI USB Ethernet
#device		rue		# RealTek RTL8150 USB Ethernet

# FireWire support
#device		firewire	# FireWire bus code
#device		sbp		# SCSI over FireWire (Requires scbus an
d da)
#device		fwe		# Ethernet over FireWire (non-standard!)

==> Here is the output from the serial port
  from the sucessful boot after upgrading
  to tag=. date=2004.08.16.15.20.00
  [after sucessful upgrade including installkernel, less fancy graphics]

Console: serial port
BIOS drive A: is disk0
BIOS drive C: is disk1
BIOS 509kB/130048kB available memory

FreeBSD/i386 bootstrap loader, Revision 1.1
(root@iyaki.subako.org, Sat Dec 18 12:24:06 PST 2004)
Loading /boot/defaults/loader.conf 
boot/kernel/kernel text=0x244858 data=0x2fd80+0x312c0 syms=[0x4+0x37e60

Copyright (c) 1992-2004 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
	The Regents of the University of California. All rights reserve
d.
FreeBSD 5.2-CURRENT #0: Sat Dec 18 15:16:07 PST 2004
    root@iyaki.subako.org:/usr/obj/usr/src/sys/Iyaki
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Pentium II/Pentium II Xeon/Celeron (333.05-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x650  Stepping = 0
  Features=0x183fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,P
GE,MCA,CMOV,PAT,PSE36,MMX,FXSR>
real memory  = 134217728 (128 MB)
avail memory = 125870080 (120 MB)
MPTable: <INTEL    440LX ISA   >
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
 cpu0 (BSP): APIC ID:  1
 cpu1 (AP): APIC ID:  0
ioapic0: Assuming intbase of 0
ioapic0 <Version 1.1> irqs 0-23 on motherboard
npx0: [FAST]
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Intel 82443LX (440 LX) host to PCI bridge> at pcibus 0 on mothe
rboard
pir0: <PCI Interrupt Routing Table: 13 Entries> on motherboard
pci0: <PCI bus> on pcib0
agp0: <Intel 82443LX (440 LX) host to PCI bridge> mem 0xf4000000-0xf7ff
ffff at device 0.0 on pci0
pcib1: <PCI-PCI bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci1: <display, VGA> at device 0.0 (no driver attached)
isab0: <PCI-ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
pci0: <mass storage, ATA> at device 7.1 (no driver attached)
uhci0: <Intel 82371AB/EB (PIIX4) USB controller> port 0xece0-0xecff irq
 11 at device 7.2 on pci0
uhci0: [GIANT-LOCKED]
usb0: <Intel 82371AB/EB (PIIX4) USB controller> on uhci0
usb0: USB revision 1.0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
piix0: <PIIX Timecounter> port 0x9000-0x900f at device 7.3 on pci0
Timecounter "PIIX" frequency 3579545 Hz quality 0
ahc0: <Adaptec 2940 Ultra2 SCSI adapter> port 0xe800-0xe8ff mem 0xfedff
000-0xfedfffff irq 9 at device 11.0 on pci0
ahc0: [GIANT-LOCKED]
aic7890/91: Ultra2 Wide Channel A, SCSI Id=7, 32/253 SCBs
pcib2: <PCIBIOS PCI-PCI bridge> at device 13.0 on pci0
pci2: <PCI bus> on pcib2
dc0: <Intel 21143 10/100BaseTX> port 0x7c00-0x7c7f mem 0xfbfff800-0xfbf
ff87f irq 10 at device 7.0 on pci2
miibus0: <MII bus> on dc0
dcphy0: <Intel 21143 NWAY media interface> on miibus0
dcphy0:  10baseT, 10baseT-FDX, auto
dc0: Ethernet address: 00:00:f8:7a:6c:af
dc0: [GIANT-LOCKED]
fxp0: <Intel 82559 Pro/100 Ethernet> port 0x7cc0-0x7cff mem 0xfbe00000-
0xfbefffff,0xfbffe000-0xfbffefff irq 9 at device 8.0 on pci2
miibus1: <MII bus> on fxp0
inphy0: <i82555 10/100 media interface> on miibus1
inphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
fxp0: Ethernet address: 00:d0:b7:40:fe:3a
fxp0: [GIANT-LOCKED]
pcib3: <PCIBIOS PCI-PCI bridge> at device 14.0 on pci0
pci3: <PCI bus> on pcib3
cpu0 on motherboard
cpu1 on motherboard
orm0: <ISA Option ROMs> at iomem 0xcd800-0xcefff,0xc0000-0xc7fff on isa0
pmtimer0 on isa0
atkbdc0: <Keyboard controller (i8042)> at port 0x64,0x60 on isa0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
psm0: failed to get data.
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: [GIANT-LOCKED]
psm0: model Generic PS/2 mouse, device ID 0
fdc0: <Enhanced floppy controller (i82077, NE72065 or clone)> at port 0
x3f7,0x3f0-0x3f5 irq 6 drq 2 on isa0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0
ppc0: Generic chipset (EPP/NIBBLE) in COMPATIBLE mode
ppbus0: <Parallel port bus> on ppc0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x100>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A, console
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on is
a0
unknown: <PNP0303> can't assign resources (port)
unknown: <PNP0c02> can't assign resources (port)
unknown: <PNP0501> can't assign resources (port)
unknown: <PNP0400> can't assign resources (port)
psmcpnp0: irq resource info is missing; assuming irq 12
unknown: <PNP0501> can't assign resources (port)
unknown: <PNP0700> can't assign resources (port)
Timecounters tick every 10.000 msec
Waiting 2 seconds for SCSI devices to settle
da0 at ahc0 bus 0 target 0 lun 0
da0: <SEAGATE ST39103LW 0001> Fixed Direct Access SCSI-2 device 
da0: 80.000MB/s transfers (40.000MHz, offset 15, 16bit), Tagged Queuein
g Enabled
da0: 8683MB (17783240 512 byte sectors: 255H 63S/T 1106C)
SMP: AP CPU #1 Launched!
cd0 at ahc0 bus 0 target 3 lun 0
cd0: <PLEXTOR CD-ROM PX-40TS 1.03> Removable CD-ROM SCSI-2 device 
cd0: 20.000MB/s transfers (20.000MHz, offset 15)
cd0: Attempt to query device size failed: NOT READY, Medium not present
 - tray closed
Mounting root from ufs:/dev/da0s1a
Pre-seeding PRNG: kickstart.
Loading configuration files.
Entropy harvesting: interrupts ethernet point_to_point kickstart.
swapon: adding /dev/da0s1b as swap device
Starting file system checks:
/dev/da0s1a: FILE SYSTEM CLEAN; SKIPPING CHECKS
/dev/da0s1a: clean, 121615 free (1231 frags, 15048 blocks, 0.8% fragmen
tation)
/dev/da0s1h: FILE SYSTEM CLEAN; SKIPPING CHECKS
/dev/da0s1h: clean, 769359 free (31 frags, 96166 blocks, 0.0% fragmenta
tion)
/dev/da0s1g: FILE SYSTEM CLEAN; SKIPPING CHECKS
/dev/da0s1g: clean, 538085 free (21 frags, 67258 blocks, 0.0% fragmenta
tion)
/dev/da0s1e: FILE SYSTEM CLEAN; SKIPPING CHECKS
/dev/da0s1e: clean, 148643 free (27 frags, 18577 blocks, 0.0% fragmenta
tion)
/dev/da0s1f: FILE SYSTEM CLEAN; SKIPPING CHECKS
/dev/da0s1f: clean, 1430630 free (11990 frags, 177330 blocks, 0.6% frag
mentation)
/dev/da0s1d: FILE SYSTEM CLEAN; SKIPPING CHECKS
/dev/da0s1d: clean, 148158 free (78 frags, 18510 blocks, 0.1% fragmenta
tion)
Setting hostname: iyaki.subako.org.
dc0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	options=8<VLAN_MTU>
	inet 67.100.223.250 netmask 0xfffffff8 broadcast 67.100.223.255
	ether 00:00:f8:7a:6c:af
	media: Ethernet autoselect (none)
	status: no carrier
fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	options=8<VLAN_MTU>
	inet 171.68.158.244 netmask 0xfffffff0 broadcast 171.68.158.255
	ether 00:d0:b7:40:fe:3a
	media: Ethernet autoselect (100baseTX <full-duplex>)
	status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
	inet 127.0.0.1 netmask 0xff000000 
add net default: gateway 67.100.223.249
Additional routing options:.
Starting devd.
Mounting NFS file systems:.
Starting syslogd.
Dec 18 16:20:02 iyaki syslogd: kernel boot file is /boot/kernel/kernel

==> Here is the output from the serial port
  from the failed boot after upgrading
  from tag=. date=2004.08.16.15.20.00 to tag=. date=2004.08.16.15.25.00
  [boot of new kernel after buildkernel, couldn't boot to run installkernel]

/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^
H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|
^H/^H-^H\^H|^H/^H-^H\^H|^HConsole: serial port
BIOS drive A: is disk0
BIOS drive C: is disk1
BIOS 509kB/130048kB available memory

FreeBSD/i386 bootstrap loader, Revision 1.1
(root@iyaki.subako.org, Sat Dec 18 12:24:06 PST 2004)
|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^
H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\
^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^HLoading /boot/defaults/loader.conf 
|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H
|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H
|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H
|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H
|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H
|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H|^H/^H-^H\^H
|^H/^H-^H\^H/boot/kernel/kernel text=0x244858 |^H/^H-^H\^H|^H/^H-^H\^H|^
H/^H-^H

==> Here is the screen from the failed boot after upgrading
  from tag=. date=2004.08.16.15.20.00 to tag=. date=2004.08.16.15.25.00

/boot.config: -h

BTX loader 1.00 BTX version is 1.01
Console: internal video/keyboard
BIOS drive A: is disk0
BIOS drive B: is disk1
BIOS 509kB/130048kB available memory

FreeBSD/i386 bootstrap loader, Revision 1.1
(root@iyaki.subako.org, Sat Dec 18 12:24:06 PST 2004)
Can't work out which disk we are booting from.
Guessed BIOS device 0xffffffff not found by probes, defaulting to disk0:

panic: free: guard1 gail @ 0x4f7dc from /usr/src/sys/boot/i386/loader/../../common/module.c:957
--> Press a key on the console to reboot <--



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