> I have a dmesg (from an U10 running 3.0_BETA) saying:
> wd0 at atabus0 drive 0: <ST320420A>
> wd0: drive supports 16-sector PIO transfers, LBA addressing
> wd0: 19458 MB, 39535 cyl, 16 head, 63 sec, 512 bytes/sect x 39851760 sectors
> wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 4 (Ultra/66)
> wd0(cmdide0:0:0): using PIO mode 4, DMA mode 2 (using DMA)
>
> and an Ultra5, running 3.0_STABLE saying:
> wd0 at atabus0 drive 0: <ST39140A>
> wd0: drive supports 16-sector PIO transfers, LBA addressing
> wd0: 8693 MB, 17662 cyl, 16 head, 63 sec, 512 bytes/sect x 17803440 sectors
> wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 2 (Ultra/33)
> wd0(cmdide0:0:0): using PIO mode 4, DMA mode 2 (using DMA)

If I am not mistaken, these are just the capabilities the *drive* reports.

The "using" line is the important one, and you can see that the
IDE chip in the Ultra5/10 does not support UDMA at all.

> Didn't found about PCI speed last time a checked.

In appendix C, there is a section on PCI speed.  All secondary buses
are 33MHz.


Regards -- Volker
-- 
------------------------------------------------------------------------
Volker A. Brandt                  Consulting and Support for Sun Solaris
Brandt & Brandt Computer GmbH              WWW: http://www.bb-c.de/~vab/
Meckenheim, Germany                                   Email: vab@bb-c.de