From my last experiments, I've come to the conclusion that this is a
PCI 2.0 vs. PCI 2.1 issue. I have a SATA card that the U5 just
"does
not see" but works nicely in an U30. It's not a sparc specific
problem,
a PentiumIII PC of similar age with a 440BX chipset doesn't "see"
the
card either.
IIRC the U5/U10 doesn't like 3.3v only PCI cards. Neither do older
Macs for example.
The U60 ( and probably the U30 ) has a 3.3v/66MHz slot so these cards
can work.
I seem to remember that the 3.3v-only cards are coded, so they don't
even fit into a 5v-only slot. (And I think I've checked this when I
was fighting with this specific card, last year, and came to the
conclusion that it must have been something different -> new theory:
PCI 2.0 vs. PCI 2.1).