Adaptec 1542B, Bios disabled, panics

Adaptec 1542B, Bios disabled, panics

[Credible]

I'm trying to boot DISK1.  Mount fails and panic ensues.
Booting from Seagate 850Meg EIDE with a Promise 2300
controller (controller BIOS enabled to get LBA on a 33Mhz
486SX - 8 Meg - Local bus - AMI Bios motherboard)

I have an Adaptec 1542B configured with BIOS disabled
and I/O ports starting at 230 (hex).  I've got an entire
115 Meg Conner SCSI drive set aside for Plan9 in whatever
partitioning it wants.  

I got as far as I did with Plan9 by disabling BOOT MANAGER
(setting the DOS partition active).  There is no free space
on the 850Meg EIDE drive.  I wanted Plan9 on the little
SCSI drive that I wasn't using.  

Somehow, I just feel like Plan9 has not put any sort of file
system on the SCSI drive.  The one odd thing is that Adaptec
supplies a partitioning utility (AFDISK).  Maybe I haven't 
done something right with the partitioning of the SCSI drive.

Is anyone else running Plan9 off a 1542 with BIOS disabled?

Thanks,
  Richard Omer
  University of Florida
  Sr. Programmer Analyst