CMD controller not found on 4000/500A

Hi,

I have a 4000/500A with CMD CQD-223/TM SCSI controller. I did a network install of 10.0_RC3 onto a 4.3GB SCSI disk and it all proceeded normally until the reboot when the kernel failed to find the CMD controller. If I netboot the same kernel, it does find the CMD card and the system runs normally. I have since updated to the RC4 kernel and see the same behaviour. The relevant lines from kernel are:

Netbooting 10.0_RC4 GENERIC

[   1.0000000] uba0 at mainbus0: Q22
[   1.0000000] mtc0 at uba0 csr 174500 vec 774 ipl 17
[   1.0000000] mscpbus0 at mtc0: version 4 model 14
[   1.0000000] mscpbus0: DMA burst size set to 4
[   1.0000000] uda0 at uba0 csr 172150 vec 770 ipl 17
[   1.0000000] mscpbus1 at uda0: version 6 model 13
[   1.0000000] mscpbus1: DMA burst size set to 4
[   1.0000000] qt0 at uba0 csr 174440 vec 764 ipl 17

Booting the same kernel from the SCSI disk (DUA1):

[   1.0000000] uba0 at mainbus0: Q22
[   1.0000000] mtc0 at uba0 csr 174500 vec 774 ipl 17
[   1.0000000] mscpbus0 at mtc0: version 4 model 14
[   1.0000000] mscpbus0: DMA burst size set to 4
[   1.0000000] qt0 at uba0 csr 174440 vec 770 ipl 17

The CMD card at mscpbus1 is missing when booted from disk.

Looking back through the mailing list archives, I see something similar reported for 9.3 on a 705A in this thread:

  http://mail-index.netbsd.org/port-vax/2023/02/01/msg004175.html

However, it doesn't look like a solution was found. Did anyone find a solution?

George