> mscpbus2 at uda1: version 5 model 13
> mscpbus2: DMA burst size set to 4
> ra3 at mscpbus2 drive 8: RA81
> ra4 at mscpbus2 drive 9: RA81
> panic: Segv in kernel mode: pc 80131bbe addr 4acc1d0
> syncing disks... Stopped in pid 0 (swapper) at   panic+0x10b:    nop
> 
Is uda1 a DEC controller or a pirate? 

Can you please test the kernel:

ftp://bakfull.campus.luth.se/netbsd/netbsd

and see what happens?

-- Ragge