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Date:      Wed, 2 Apr 1997 11:12:01 -0600 (CST)
From:      "Kent S. Gordon" <kgor@inetspace.com>
To:        freebsd-scsi@freebsd.org
Subject:   Hang on boot in recent -current kernels
Message-ID:  <199704021712.LAA00228@chess.inetspace.com>

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I have not been able to boot -current kernels using sources after
about March 23.  The boot hangs after getting the message
scbus0 at bt0 bus 0.

What suggests do people have for me to try in debugging this problem.
I have attached below the output of the boot from the latest working
kernel that I have plus my kernel config file.
Apr  2 11:03:23 chess /kernel.good: Copyright (c) 1992-1997 FreeBSD Inc.
Apr  2 11:03:23 chess /kernel.good: Copyright (c) 1982, 1986, 1989, 1991, 1993
Apr  2 11:03:23 chess /kernel.good: 	The Regents of the University of California. All rights reserved.
Apr  2 11:03:23 chess /kernel.good: FreeBSD 3.0-CURRENT #0: Thu Mar 20 06:10:23 CST 1997
Apr  2 11:03:23 chess /kernel.good:     root@chess.inetspace.com:/usr/src/sys/compile/CHESS
Apr  2 11:03:23 chess /kernel.good: CPU: i486DX (486-class CPU)
Apr  2 11:03:23 chess /kernel.good: real memory  = 16777216 (16384K bytes)
Apr  2 11:03:23 chess /kernel.good: avail memory = 14794752 (14448K bytes)
Apr  2 11:03:24 chess /kernel.good: Probing for devices on the ISA bus:
Apr  2 11:03:24 chess /kernel.good: sc0 at 0x60-0x6f irq 1 on motherboard
Apr  2 11:03:24 chess /kernel.good: sc0: VGA color <16 virtual consoles, flags=0x0>
Apr  2 11:03:24 chess /kernel.good: ed0 at 0x300-0x31f irq 5 on isa
Apr  2 11:03:24 chess /kernel.good: ed0: address 00:00:e8:cb:ac:1a, type NE2000 (16 bit) 
Apr  2 11:03:24 chess /kernel.good: sio0 at 0x3f8-0x3ff irq 4 on isa
Apr  2 11:03:24 chess /kernel.good: sio0: type 16550A
Apr  2 11:03:24 chess /kernel.good: sio1 at 0x2f8-0x2ff irq 3 on isa
Apr  2 11:03:24 chess /kernel.good: sio1: type 16550A
Apr  2 11:03:24 chess /kernel.good: lpt0 at 0x378-0x37f irq 7 on isa
Apr  2 11:03:24 chess /kernel.good: lpt0: Interrupt-driven port
Apr  2 11:03:24 chess /kernel.good: lp0: TCP/IP capable interface
Apr  2 11:03:25 chess /kernel.good: fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
Apr  2 11:03:25 chess /kernel.good: fdc0: NEC 765
Apr  2 11:03:25 chess /kernel.good: fd0: 1.44MB 3.5in
Apr  2 11:03:25 chess /kernel.good: fd1: 1.2MB 5.25in
Apr  2 11:03:25 chess /kernel.good: bt0: Bt445S/ 0-ISA(24bit) bus
Apr  2 11:03:25 chess /kernel.good: bt0: Your card cannot DMA above 16MB boundary. Bounce buffering enabled.
Apr  2 11:03:25 chess /kernel.good: bt0: reading board settings, dma=5, int=11
Apr  2 11:03:25 chess /kernel.good: bt0: version 3.36, fast sync, parity, 32 mbxs, 32 ccbs
Apr  2 11:03:25 chess /kernel.good: bt0: targ 0 sync rate=10.00MB/s(100ns), offset=15
Apr  2 11:03:25 chess /kernel.good: bt0: targ 1 sync rate=10.00MB/s(100ns), offset=15
Apr  2 11:03:25 chess /kernel.good: bt0: Using Strict Round robin scheme
Apr  2 11:03:25 chess /kernel.good: bt0 at 0x330 irq 11 drq 5 on isa
Apr  2 11:03:26 chess /kernel.good: bt0: waiting for scsi devices to settle
Apr  2 11:03:26 chess /kernel.good: scbus0 at bt0 bus 0
Apr  2 11:03:26 chess /kernel.good: sd0 at scbus0 target 0 lun 0  
Apr  2 11:03:26 chess /kernel.good: sd0: <DEC DSP5200S T392> type 0 fixed SCSI 2
Apr  2 11:03:26 chess /kernel.good: sd0: Direct-Access 1908MB (3907911 512 byte sectors)
Apr  2 11:03:26 chess /kernel.good: sd1 at scbus0 target 1 lun 0
Apr  2 11:03:26 chess /kernel.good: sd1: <SEAGATE ST31200N 8648> type 0 fixed SCSI 2
Apr  2 11:03:26 chess /kernel.good: sd1: Direct-Access 1006MB (2061108 512 byte sectors)
Apr  2 11:03:26 chess /kernel.good: npx0 on motherboard
Apr  2 11:03:26 chess /kernel.good: npx0: INT 16 interface
Apr  2 11:03:26 chess /kernel.good: changing root device to sd0a

#
# GGZOO -- Cyrix 586/100 with BT controller
#
# For more information read the handbook part System Administration -> 
# Configuring the FreeBSD Kernel -> The Configuration File. 
# The handbook is available in /usr/share/doc/handbook or online as
# latest version from the FreeBSD World Wide Web server 
# <URL:http://www.FreeBSD.ORG/>;
#
# An exhaustive list of options and more detailed explanations of the 
# device lines is present in the ./LINT configuration file. If you are 
# in doubt as to the purpose or necessity of a line, check first in LINT.
#
#	$Id: GENERIC,v 1.78 1996/11/16 01:09:17 gibbs Exp $

machine		"i386"
#cpu		"I386_CPU"
cpu		"I486_CPU"
cpu		"I586_CPU"
cpu		"I686_CPU"
ident		GGZOO
maxusers	10

#options		MATH_EMULATE		#Support for x87 emulation
options		INET			#InterNETworking
options		FFS			#Berkeley Fast Filesystem
options		NFS			#Network Filesystem
options		MSDOSFS			#MSDOS Filesystem
options		"CD9660"		#ISO 9660 Filesystem
options		PROCFS			#Process filesystem
options		"COMPAT_43"		#Compatible with BSD 4.3 [KEEP THIS!]
#options		SCSI_DELAY=15		#Be pessimistic about Joe SCSI device
options		SCSI_DELAY=5		#Be pessimistic about Joe SCSI device
options		BOUNCE_BUFFERS		#include support for DMA bounce buffers
options		UCONSOLE		#Allow users to grab the console
options		FAILSAFE		#Be conservative
options		USERCONFIG		#boot -c editor
options		VISUAL_USERCONFIG	#visual boot -c editor
options		SYSVSHM
options		SYSVSEM
options		SYSVMSG
options		"AUTO_EOI_1"		#faster interrupts


config		kernel	root on wd0

controller	isa0
#I have a VLB, but no aha28xx cards, that think they are on a eisa bus.
#controller	eisa0
#controller	pci0

controller	fdc0	at isa? port "IO_FD1" bio irq 6 drq 2 vector fdintr
disk		fd0	at fdc0 drive 0
disk		fd1	at fdc0 drive 1
#tape		ft0	at fdc0 drive 2

#controller	wdc0	at isa? port "IO_WD1" bio irq 14 vector wdintr
#disk		wd0	at wdc0 drive 0
#disk		wd1	at wdc0 drive 1

#controller	wdc1	at isa? port "IO_WD2" bio irq 15 vector wdintr
#disk		wd2	at wdc1 drive 0
#disk		wd3	at wdc1 drive 1

#options		ATAPI		#Enable ATAPI support for IDE bus
#options		ATAPI_STATIC	#Don't do it as an LKM
#device		wcd0	#IDE CD-ROM

# A single entry for any of these controllers (ncr, ahb, ahc) is sufficient
# for any number of installed devices.
#controller	ncr0
#controller	ahb0
#controller	ahc0

controller	bt0	at isa? port "IO_BT0" bio irq ? vector bt_isa_intr
#controller	uha0	at isa? port "IO_UHA0" bio irq ? drq 5 vector uhaintr
#controller	aha0	at isa? port "IO_AHA0" bio irq ? drq 5 vector ahaintr
#controller	aic0	at isa? port 0x340 bio irq 11 vector aicintr
#controller	nca0	at isa? port 0x1f88 bio irq 10 vector ncaintr
#controller	nca1	at isa? port 0x350 bio irq 5 vector ncaintr
#controller	sea0	at isa? bio irq 5 iomem 0xc8000 iosiz 0x2000 vector seaintr

controller	scbus0

device		sd0

device		od0	#See LINT for possible `od' options.

device		st0

device		cd0	#Only need one of these, the code dynamically grows

#device		wt0	at isa? port 0x300 bio irq 5 drq 1 vector wtintr
#device		mcd0	at isa? port 0x300 bio irq 10 vector mcdintr

#controller	matcd0	at isa? port 0x230 bio

#device		scd0	at isa? port 0x230 bio

# syscons is the default console driver, resembling an SCO console
device		sc0	at isa? port "IO_KBD" tty irq 1 vector scintr
# Enable this and PCVT_FREEBSD for pcvt vt220 compatible console driver
#device		vt0	at isa? port "IO_KBD" tty irq 1 vector pcrint
#options		PCVT_FREEBSD=210	# pcvt running on FreeBSD >= 2.0.5
#options		XSERVER			# include code for XFree86
#options		FAT_CURSOR		# start with block cursor
# If you have a ThinkPAD, uncomment this along with the rest of the PCVT lines
#options		PCVT_SCANSET=2		# IBM keyboards are non-std

# Mandatory, don't remove
device		npx0	at isa? port "IO_NPX" irq 13 vector npxintr

#
# Laptop support (see LINT for more options)
#
#device		apm0    at isa?	disable	# Advanced Power Management
#options		APM_BROKEN_STATCLOCK	# Workaround some buggy APM BIOS
# PCCARD (PCMCIA) support
#controller	crd0
#device		pcic0	at crd?
#device		pcic1	at crd?

device		sio0	at isa? port "IO_COM1" tty irq 4 vector siointr
device		sio1	at isa? port "IO_COM2" tty irq 3 vector siointr
#device		sio2	at isa? disable port "IO_COM3" tty irq 5 vector siointr
#device		sio3	at isa? disable port "IO_COM4" tty irq 9 vector siointr

device		lpt0	at isa? port? tty irq 7 vector lptintr
#device		lpt1	at isa? port? tty
#device		mse0	at isa? port 0x23c tty irq 5 vector mseintr

#device		psm0	at isa? disable port "IO_KBD" conflicts tty irq 12 vector psmintr

# Order is important here due to intrusive probes, do *not* alphabetize
# this list of network interfaces until the probes have been fixed.
# Right now it appears that the ie0 must be probed before ep0. See
# revision 1.20 of this file.
#device de0
#device fxp0
#device vx0

#device ed0 at isa? port 0x280 net irq  5 iomem 0xd8000 vector edintr
#device ed1 at isa? port 0x300 net irq  5 iomem 0xd8000 vector edintr
device ed0 at isa? port 0x300 net irq  5 iomem 0xd8000 vector edintr
#device ie0 at isa? port 0x360 net irq  7 iomem 0xd0000 vector ieintr
#device ep0 at isa? port 0x300 net irq 10 vector epintr
#device fe0 at isa? port 0x300 net irq ? vector feintr
#device ix0 at isa? port 0x300 net irq 10 iomem 0xd0000 iosiz 32768 vector ixintr
#device le0 at isa? port 0x300 net irq 5 iomem 0xd0000 vector le_intr
#device lnc0 at isa? port 0x280 net irq 10 drq 0 vector lncintr
#device ze0 at isa? port 0x300 net irq 5 iomem 0xd8000 vector zeintr
#device zp0 at isa? port 0x300 net irq 10 iomem 0xd8000 vector zpintr

pseudo-device	loop
pseudo-device	ether
pseudo-device	log
#pseudo-device	sl	1
# ijppp uses tun instead of ppp device
#pseudo-device	ppp	1
pseudo-device	tun	1
pseudo-device	pty	32
pseudo-device	bpfilter	4	#Berkeley packet filter
pseudo-device	gzip		# Exec gzipped a.out's

# KTRACE enables the system-call tracing facility ktrace(2).
# This adds 4 KB bloat to your kernel, and slightly increases
# the costs of each syscall.
options		KTRACE		#kernel tracing

Kent S. Gordon
Senior Software Engineer
INetSpace Co.
voice: (972)851-3494 fax:(972)702-0384 e-mail:kgor@inetspace.com



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