>     Aside from local source tree brokeness (make cleandir/new tree time?), I
> was under the impression that you were supposed/required to use the 80 bin
> Ultra 66 ribbon cable even for PIO ATA and Ultra 33 devices connected to an
> Ultra 66 controller. I could be wrong though.

It's *strongly* recommended for better signal stability, but it is not
required for UDMA-33.