thanks for the suggestion, indeed I have 2 kayspan FW: both workon the G3 beige with Apple extensions, none works on the 7600. I tried all PCI slots. Yesterday I plugged them on the G3 B&W, OS X 10.3: system profiler sees them but no HDs are mounted, pretty weird.

BTW, after removing the two SCSI HDs now the 7600/G4 with the Acard IDE PCI is rocksolid!