I realized that this on-board SCSI controller on the
UP2000 motherboard is giving all the trouble. I just realized
that the vendor of the system installed two LVD hard disks
in the connector for "single-ended SCSI" instead of
"LVD-SCSI". When I switch the connection so that
the LVD hard disk (Seagate LW-series 36G Cheeta) are
hooked to the correct LVD connector, it shows "80Mbyte/sec
message" corretly. But booting stops very early
in the bootstrap process without giving "aboot...." UP-2000
has been on the market for quite some time. Yet,
they were not able to fix such a bug. Hard to believe.
Now, I'd like to abandon the aic-7890 all together, and to use
a Symbios PCI card. Then, the boot does not start at all
with the message such as "dka0.0.0.0.6.0 is not a valid boot block"
or something. How can I disable the on-board aic-7890?
Is there a jumper switch somewhere?
G. Hugh Song