generic HBA errors on Mac Classic II

[Ben Kallus <benjamin.p.kallus.gr%dartmouth.edu@localhost>]

Hello everyone,

I am trying to install NetBSD 10.1 on a Mac Classic II with 10MB of
RAM, a BlueSCSI, and no FPU.

Here's what I've done so far:
0. Install Mac OS 7.5.3 on BlueSCSI drive 6 (500MB).
1. Drop the 10.1 install iso onto the BlueSCSI as CD 2.
2. Place an empty 2GB file on the BlueSCSI as drive 0.
3. Boot up OS 7, enable 32-bit addressing, reboot, and run Booter from the CD.
4. Boot the INSTALLSBC kernel and partition the disk in the installer.
This works fine.
5. Attempt to install the base, etc, and kernel sets. Extracting the
base tarball failed after about 10 hours (15%).
6. At this point, I shut off the computer, and mounted the BlueSCSI
disks in QEMU as follows:
qemu-system-m68k -M q800 -m 128 -bios ./Quadra-650.ROM -drive
file=/path/to/HD0.hda,format=raw,if=scsi -drive
file=/path/to/HD6.hda,format=raw,if=scsi -cdrom /path/to/CD2.iso -g
640x480x1
7. In QEMU, I installed the kernel, base, and etc sets. I then unmount
the BlueSCSI.
8. I boot up the Classic II and attempt to boot from the
freshly-prepared install. The boot process appears to go smoothly, but
then I get these messages repeated 6 times:
[...] sbc0: parity error!
[...] sbc0: parity error!
[...] sbc0: parity error!
[...] sbc0: target 0, bad status=-1
[...] probe(sbc0:0:0:0): generic HBA error

Then, it says this:
[...] swwdog0: software watchdog initialized
[...] boot device: <unknown>
[...] root device:

At this point the machine hangs and does not respond to keyboard
input. If I press the further back button on the side of the Classic
II, it enters the debugger and I get the db> prompt, but I still can't
type anything.

The strange part is, the INSTALLSBC kernel boots perfectly fine. It
doesn't have any of these errors, and I can even mount the disk and
chroot into the new install when using the INSTALLSBC kernel.

I have tried disabling parity checking on the BlueSCSI, but it doesn't
change anything.

Any ideas on what to try next?

Thanks,
Ben