I'm trying to get 1.5.2 to run on a IIci system (80M RAM, 240M SCSI Quantum
LPS ProDrive, Daystar 40 accelerator, Apple Hi-Res video card, ethernet).
I'm using the "regular" kernel, booting the MacOS with all extensions
disabled, disabling the Daystar caching, and trying to boot into
single-user mode.  Here's my dmesg.  (The "00:00" MAC address for the
Ethernet card is a fictitious number.)
----------------
Apple Macintosh IIci (68040)
cpu: delay factor 388
real mem= 83886080
avail mem= 78118912
using 204 buffers containing 835584 bytes of memory
mrg: 'Mac IIci/Q700 ROMs' ROM glue, tracing off, debug off, silent traps
mrg: I/O map kludge for ROMs that use hardware addresses directly.
adb: bus subsystem
mrg: skipping egret setup
adb: calling ADBReInit
adb: using II series hardware support
adb: cleanup: nothing returned
adb: ADBReInit complete
adb: keyboard at 2
adb: 100 dpi mouse at 3
mainbus0 (root)
obio0 at mainbus0
adb0 at obio0 (ADB event device)
asc0 at obio0:  Apple Sound Chip
mcrscsi0 at obio0
scsibus0 at mcrscsi0: 8 targets
sd0 at scsibus0 targ 0 lun 0: <QUANTUM, LP240S GM240S01X, 6.4> SCSI2
0/direct fixed
sd0: 234MB, 1818 cyl, 4 head, 65 sec, 512 bytes/sec, 479350 sec total
zsc0 at obio0 chip type 0
zstty0 at zsc0 channel 0
zstty1 at zsc0 channel 1
nubus0 at mainbus0
ae0 at nubus0: address 00:00:00:00:00:00, type Farallon EtherWave Nubus,
32KB memory
macvid0 at nubus0: Mac II High-Resolution Video Card
macvid0: 640 x 480, monochrome
grf0 at macvid0
ite at grf0 not configured
ae0: warning - receiver ring buffer overrun
fpu0 at mainbus0 (mc68040)
root on sd0a swap on sd0b
----------------------------

Now, I get the following message as the boot process continues.


------------------------
sd0: mode sense (4) returned nonsense; using fictitious geometry
panic: cannot mount root, error=79
------------------------

And then I'm dropped into the debugger.
What I am doing (wrong) that's causing these problems?  More to the point,
how can I overcome them?

V. Ricks