I have practically the exact same hardware setup running fine on
another SPARCstation IPC.  In fact about the only difference is that
the disk on the machine I'm having problems with identifies itself
as "300X", while the okay one says "300N".  However, for some reason,
this one (300X) won't complete its bootup.  The problem sounds very much
like that described in:

https://citadelle.intrinsec.com/mailing/current/HTML/ml_netbsd-bugs/5106.html
     Someone suggested that I turn off tagged command queueing and
     indeed that fixes my problem and the machine boots fine again.

Is there some way I can turn off tagged queueing with a command line
switch to the /netbsd kernel before it starts to boot up in order to
check this out, or am I going to have to try to compile a kernel on
another machine and then somehow transfer that over to the cripled one?

OR, is this some other problem?  Any hints welcome.  Appending the boot
up messages below.  TIA

-- 
henry nelson
 | day job: | http://yuba.kcn.ne.jp/biorec/nehan/henken.html


NetBSD 1.6.2 (GENERIC) #0: Wed Feb 11 08:05:11 UTC 2004
    autobuild@tgm.netbsd.org:/autobuild/netbsd-1-6-PATCH002/sparc/OBJ/autobuild/
netbsd-1-6-PATCH002/src/sys/arch/sparc/compile/GENERIC
total memory = 11896 KB
avail memory = 7916 KB
using 128 buffers containing 512 KB of memory
bootpath: /sbus0/esp@0,800000/sd@3,0
mainbus0 (root): SUNW,Sun 4/40
cpu0 at mainbus0: MB86900/1A or L64801 @ 25 MHz, WTL3170/2 FPU
cpu0: 64K byte write-through, 16 bytes/line, sw flush: cache enabled
memreg0 at mainbus0 ioaddr 0xf4000000
clock0 at mainbus0 ioaddr 0xf2000000: mk48t02: hostid 52415311
timer0 at mainbus0 ioaddr 0xf3000000 ipl 10: delay constant 10
auxreg0 at mainbus0 ioaddr 0xf7400003
zs0 at mainbus0 ioaddr 0xf1000000 ipl 12 softpri 6
zstty0 at zs0 channel 0 (console i/o)
zstty1 at zs0 channel 1
zs1 at mainbus0 ioaddr 0xf0000000 ipl 12 softpri 6
kbd0 at zs1 channel 0: baud rate 1200
ms0 at zs1 channel 1: baud rate 1200
audioamd0 at mainbus0 ioaddr 0xf7201000 ipl 13 softpri 4
audio0 at audioamd0: full duplex
sbus0 at mainbus0 ioaddr 0xf8000000: clock = 25 MHz
dma0 at sbus0 slot 0 offset 0x400000: dma rev 1
esp0 at sbus0 slot 0 offset 0x800000 level 3: ESP100A, 25MHz, SCSI ID 7
scsibus0 at esp0: 8 targets, 8 luns per target
le0 at sbus0 slot 0 offset 0xc00000 level 5: address 08:00:20:0f:dc:a6
le0: 8 receive buffers, 2 transmit buffers
bwtwo0 at sbus0 slot 3 offset 0x0 level 7: SUNW,501-1561, 1152 x 900
bwtwo0: attached to /dev/fb
fdc0 at mainbus0 ioaddr 0xf7200000 ipl 11 softpri 4: chip 82072
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
scsibus0: waiting 2 seconds for devices to settle...
sd0 at scsibus0 target 3 lun 0: <QUANTUM, FIREBALL_TM1280S, 300X> SCSI2 0/direct
 fixed
sd0: 1222 MB, 6810 cyl, 2 head, 183 sec, 512 bytes/sect x 2503872 sectors
sd0: sync (200.0ns offset 15), 8-bit (5.000MB/s) transfers, tagged queueing
Kernelized RAIDframe activated
root on sd0a dumps on sd0b
root file system type: ffs