Hi again. I got a few responses which acknowledged using the second drive
on IDE-based systems, but nothing from a SCSI standpoint. A suggestion was
made to post more information on what the scenario was, so here goes...

The system is panicing/hanging within a minute of being brought into
multi-user mode.  Single-user can go on for quite a while - had
successfully installed over NFS previously without a hitch. Depending
on what gets done in rc.local, the panic varies, but in a reproducible
series if the startup procedure gets changed.

If sd0 is removed so that sd1 becomes sd0, NO PROBLEMS! I would rather not have
to play with SCSI cables to switch between OSes...

Software:

NetBSD 1.2
OS-BS 2.0 beta boot loader

Hardware:

A couple of configurations were used, and mixed around to try to locate
a hardware issue. Both behaved identically as far as panic went.

Supermicro P6DNE dual P6-200 motherboaard
64MB RAM				
SMC EtherPower PCI LAN card		
Adaptec 2940 PCI SCSI card		
Nitro64 video card, 2MB vram, or ATI 8514-based ISA video card, 1MB video

AT&T 3349 Pentium-133
on-board S3-based video, 1MB vram
64 MB RAM
SMC EtherPower PCI LAN card
Adaptec 2940 PCI SCSI card

The first drive (sd0) is a Seagate ST31051N
The second drive (sd1) has been tried as a Seagate ST31231N or a Seagate 
ST51080N
Different SCSI cables (3) were used.


Panic #1 : modload on the X aperture driver
vm_fault(0xf8916b00,91902000,3,0) -> 1
_edata()
_end()
_lkmioctl()
_spec_ioctl()
_vn_ioctl()
_sys_ioctl()
_syscall(54)

Panic #2 : no aperture driver, but with xdm

_pmap_pte()
_pmap_changebit()
_pmap_page_protect()
_vm_object_pmap_copy()
_vm_mmap()
_sys_mmap()
_syscall(198)

Occasionally, a repeated bad inode will show up on the console in this config.

Panic #3 : login as root; cd /var/log; ls

Stopped at 0xffffffff
vm_fault(0xb82b4000,fffff000,1,0) -> 1
_db_read_bytes()
_db_get_value()
_db_disasm()
_db_print_loc_and_inst()
_db_trap
_kdb_trap
_trap(-1)
vm_fault(0xf8931300,0,1,0) -> 1

Hang #1 : no X startup, logging in as root, typing 'pwd':

sgetc(1,0,...)
pcmmap(0)
softclock()
hardclock()
clockintr()
Xrecurse0()
_INTERRUPT
Xprot

Kernel Config File:
#	$NetBSD: GENERIC,v 1.40 1996/03/30 23:57:09 perry Exp $
#
#	GENERIC -- everything that's currently supported
#

machine		i386		# architecture, used by config; REQUIRED

#options		I386_CPU	# CPU classes; at least one is REQUIRED
options		I486_CPU
options		I586_CPU
options		I686_CPU
#options		MATH_EMULATE	# floating point emulation
#options		CCDDEBUG	# CCD debug mode thingy majiggy

# Some BIOSes don't get the size of extended memory right.  If you
# have a broken BIOS, uncomment the following and set the value
# properly for your system.
options		EXTMEM_SIZE=97280	# size of extended memory

#options		DUMMY_NOPS	# speed hack; recommended
options		XSERVER,UCONSOLE
#options		INSECURE	# insecure; allow /dev/mem writing for X
options		MACHINE_NONCONTIG

maxusers	32		# estimated number of users
options		TIMEZONE=0	# time zone to adjust RTC time by
options		DST=0		# daylight savings time used by RTC

options		SWAPPAGER	# paging; REQUIRED
options		VNODEPAGER	# mmap() of files
options		DEVPAGER	# mmap() of devices

options		DDB		# in-kernel debugger
options		DEBUG
#makeoptions	DEBUG="-g"	# compile full symbol table
options		DIAGNOSTIC	# internal consistency checks
options		KTRACE		# system call tracing, a la ktrace(1)

options		SYSVMSG		# System V-like message queues
options		SYSVSEM		# System V-like semaphores
options		SYSVSHM		# System V-like memory sharing
#options	SHMMAXPGS=1024	# 1024 pages is the default

options		COMPAT_NOMID	# compatibility with 386BSD, BSDI, NetBSD 0.8,
options		COMPAT_09	# NetBSD 0.9,
options		COMPAT_10	# NetBSD 1.0,
options		COMPAT_11	# NetBSD 1.1,
options		COMPAT_43	# and 4.3BSD
options		TCP_COMPAT_42	# TCP bug compatibility with 4.2BSD

options		COMPAT_SVR4	# binary compatibility with SVR4
options		COMPAT_IBCS2	# binary compatibility with SCO and ISC
options		COMPAT_LINUX	# binary compatibility with Linux
options		COMPAT_FREEBSD	# binary compatibility with FreeBSD

options		VM86
options		USER_LDT	# user-settable LDT; used by WINE
options		LKM		# loadable kernel modules

options		FFS		# UFS
options		QUOTA		# UFS quotas
options		LFS		# log-structured file system
options		MFS		# memory file system

options		NFSCLIENT	# Network File System client
options		NFSSERVER	# Network File System server

options		CD9660		# ISO 9660 + Rock Ridge file system
options		MSDOSFS		# MS-DOS file system
options		FDESC		# /dev/fd
options		FIFO		# FIFOs; RECOMMENDED
options		KERNFS		# /kern
options		NULLFS		# loopback file system
options		PORTAL		# ?
options		PROCFS		# /proc
options		UMAPFS		# NULLFS + uid and gid remapping
options		UNION		# union file system

#options         IPSENDREDIRECTS="-1"
#options         IPFORWARDING="-1"

#options	GATEWAY		# packet forwarding
options		INET		# IP + ICMP + TCP + UDP
#options		NS		# XNS
#options		ISO,TPIP	# OSI
#options		EON		# OSI tunneling over IP
#options		CCITT,LLC,HDLC	# X.25

options         PCVT_NSCREENS="10"
#options                PCVT_PRETTYSCRNS
#options         PCVT_META_ESC   
options         SETUIDSCRIPTS   

config          netbsd  root on sd1 swap on sd1 dumps on sd1

#config		netbsd	swap generic
#options		GENERIC

mainbus0 at root

isa0	at mainbus0
pci0	at mainbus0 bus ?

#ppb*	at pci? dev ? function ?	# PCI-PCI bridges
#pci*	at ppb? bus ?

npx0	at isa? port 0xf0 irq 13	# math coprocessor

#pc0	at isa? port 0x60 irq 1		# generic PC console device
vt0	at isa? port 0x60 irq 1

com0	at isa? port 0x3f8 irq 4	# standard PC serial ports
com1	at isa? port 0x2f8 irq 3
#com2	at isa? port 0x3e8 irq 5
#com3	at isa? port 0x2e8 irq 9
#ast0	at isa? port 0x1a0 irq 5	# AST 4-port serial cards
#com*	at ast? slave ?
#boca0	at isa? port 0x100 irq 5	# BOCA 8-port serial cards
#com*	at boca? slave ?
#rtfps0	at isa? port 0x1230 irq 10	# RT 4-port serial cards
#com*	at rtfps? slave ?

#cy0	at isa? ...

#lpt0	at isa? port 0x378 irq 7	# standard PC parallel ports
#lpt1	at isa? port 0x278
#lpt2	at isa? port 0x3bc

#lms0	at isa? port 0x23c irq 5	# Logitech bus mouse
#lms1	at isa? port 0x238 irq 5
#mms0	at isa? port 0x23c irq 5	# Microsoft InPort mouse
#mms1	at isa? port 0x238 irq 5
#pms0	at pckbd? irq 12		# PS/2 auxiliary port mouse

#aha0	at isa? port 0x330 irq ? drq ?	# Adaptec 154[02] SCSI controllers
#aha1	at isa? port 0x334 irq ? drq ?	# Adaptec 154[02] SCSI controllers
#scsibus* at aha?
#ahb*	at eisa? slot ?			# Adaptec 174[024] SCSI controllers
#scsibus* at ahb?
ahc*	at pci? dev ? function ?	# Adaptec 2940 SCSI controllers
scsibus* at ahc?
#ahe0	at isa? port 0x1c00 irq ?	# Adaptec 284x SCSI controllers
#scsibus* at ahe?
#aic0	at isa? port 0x340 irq 12	# Adaptec 152[02] SCSI controllers
#scsibus* at aic?
#bt0	at isa? port 0x330 irq ? drq ?	# BusLogic [57]4X SCSI controllers
#bt1	at isa? port 0x334 irq ? drq ?	# BusLogic [57]4X SCSI controllers
#bt2	at isa? port ? irq ?
#scsibus* at bt?
#ncr*	at pci? dev ? function ?	# NCR 538XX SCSI controllers
#scsibus* at ncr?
#sea0	at isa? iomem 0xc8000 irq 5
#scsibus* at sea?
#uha0	at isa? port 0x330 irq ? drq ?	# UltraStor [13]4f SCSI controllers
#uha1	at isa? port 0x334 irq ? drq ?	# UltraStor [13]4f SCSI controllers
#uha2	at isa? port ? irq ?		# UltraStor 24f SCSI controllers
#scsibus* at uha?
#wds0	at isa? port 0x350 irq 15 drq 6	# WD7000 and TMC-7000 controllers
#wds1	at isa? port 0x358 irq 11 drq 5
#scsibus* at wds?

sd*	at scsibus? target ? lun ?	# SCSI disk drives
st*	at scsibus? target ? lun ?	# SCSI tape drives
cd*	at scsibus? target ? lun ?	# SCSI CD-ROM drives
#ch*	at scsibus? target ? lun ?	# SCSI autochangers

fdc0	at isa? port 0x3f0 irq 6 drq 2	# standard PC floppy controllers
#fdc1	at isa? port 0x370 irq ? drq ?
fd*	at fdc? drive ?

#mcd0	at isa? port 0x300 irq 10	# Mitsumi CD-ROM drives

#wdc0	at isa? port 0x1f0 irq 14	# ST506, ESDI, and IDE controllers
#wdc1	at isa? port 0x170 irq ?
#wd*	at wdc? drive ?

#wt0	at isa? port 0x300 irq 5 drq 1	# Archive and Wangtek QIC tape drives

ed0	at isa? port 0x280 iomem 0xd0000 irq 9	# WD/SMC, 3C503, and NE[12]000
ed1	at isa? port 0x240 iomem 0xd8000 irq 3	#   ethernet cards
ed2	at isa? port 0x300 iomem 0xcc000 irq 10

#ed0	at isa? port 0x280 iomem 0xd0000 irq 9	# WD/SMC, 3C503, and NE[12]000
#ed1	at isa? port 0x250 iomem 0xd8000 irq 9	#   ethernet cards
#ed2	at isa? port 0x300 iomem 0xcc000 irq 10
#eg0	at isa? ...				# 3C505 ethernet cards
#el0	at isa? port 0x300 irq 9		# 3C501 ethernet cards
#ep0	at isa? port ? irq ?			# 3C509 ethernet cards
#ie0	at isa? port 0x360 iomem 0xd0000 irq 7	# StarLAN, 3C507, and Etherexpress
#le0	at isa? port 0x320 irq 10 drq 7		# IsoLan, NE2100, and DEPCA
#le*	at pci? dev ? function ?		# PCnet-PCI based ethernet cards
de*	at pci? dev ? function ?		# DC21X4X-based ethernet cards
#ep*	at pci? dev ? function ?		# 3C590 ethernet cards

#pss0	at isa? port 0x220 irq 7 drq 6  # Personal Sound System
#sp0	at pss0 port 0x530 irq 10 drq 0	# 	sound port driver

sb0	at isa? port 0x220 irq 5 drq 1	# SoundBlaster
#wss0	at isa? port 0x530 irq 10 drq 0	# Windows Sound System
#pas0	at isa? port 0x220 irq 7 drq 1	# ProAudio Spectrum
#gus0	at isa? port 0x220 irq 7 drq 1 flags 6 # Gravis Ultra Sound (flags is 
record drq for full-duplex)
#spkr0	at pckbd? port 0x61

# Joystick driver. Probe is a little strange; add only if you have one.
#joy0	at isa? port 0x201

pseudo-device	loop	1		# network loopback
pseudo-device	bpfilter 8		# packet filter
pseudo-device	sl	2		# CSLIP
pseudo-device	ppp	2		# PPP
pseudo-device	tun	2		# network tunneling over tty

pseudo-device	pty	64		# pseudo-terminals
pseudo-device	tb	1		# tablet line discipline
pseudo-device	vnd	4		# paging to files
pseudo-device	ccd	4		# concatenated disk devices

-------------------------------------------------------------------------------
Paul J. Lavoie		paull@ilx.com		(212) 720-3029
ILX Systems, Inc.	111 Fulton St		New York, NY  10038