I have a Promise Ultra 66 eide controller, but think it is only being acessed at 33 Mhz. I have looked around, but have not found how to ascertain what rate Fedora is using it at.
Is there a way to configure FC1 to use it at 66MHz?
Try 'hdparm -I /dev/hdx' where x is your real HD..
The * indicates what your device is using.
An extract from mine : DMA: mdma0 mdma1 mdma2 udma0 udma1 *udma2
Cheers, Michael