Hi all,
I've got an older i386 (PI) with an IDE drive that supports Ultra33, and
for which NetBSD (3.1) aggrees yet sets the drive to the next mode down:

# dmesg | grep wd0
wd0 at atabus0 drive 0: <FUJITSU MPB3043ATU>
wd0: drive supports 16-sector PIO transfers, LBA addressing
wd0: 4125 MB, 8940 cyl, 15 head, 63 sec, 512 bytes/sect x 8448300 sectors
wd0: 32-bit data port
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 2 (Ultra/33)
wd0(piixide0:0:0): using PIO mode 4, DMA mode 2 (using DMA)
boot device: wd0
root on wd0a dumps on wd0b

The IDE controller is an on-board Intel 82371SB IDE Interface (PIIX3)
(rev. 0x00) and the IDE cable is a std 40-pin/40-conductor which should
be fine up to Ultra33 speeds.  The kernel is just a paired down GENERIC
with the wd(4) flag set to 0x0000 ( uses whatever mode the drive says it
supports). Any idea why the drivve isn't getting the highest supported
setting?

Cheers,
Jeff