> If I put a UDMA 100 hard drive on a UDMA 66 controller, it will be limited
> to UDMA 66 speed. But what if I also put a UDMA 33 drive on the same
> controller with it? Will the UDMA 100 drive run at 33 or will both drives
> run at what they are capable of? Are there any conflicts or

        Well this is SUPPOSED to work, each drive runs in it's own highest
supported mode. However, there have been incompatibilities between drives
and between drive and controllers that result in this not working out so
well.

> problems that I
> need to be aware of? Would I be better off leaving the 100 by
> itself on the
> primary and put the 33 on the secondary?

        If the secondary is free then I recommend putting the second on the
secondary. You will get higher performance on drive to drive transfers. Hope
this helped, TTYL

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