My motherboard (Abit BE6) supports Ultra DMA 33 and 66 but it is only available on ide2 and ide3 (3rd and 4th eide slots).  I found the chip (highpoint tech.) in the hardware compatibility list on RedHat.com (I am running 7.0) and it is supported, but harder to install if it is not the primary ide (ide0, ide1). I tried telling the kernel that I have my HD connected to UDMA, but alas the kernel didn't feel like listening.  I have a clean install of Linux on this drive without using UDMA and now I would like to use my previous install with the UDMA.  I am pretty new to Linux (meaning I know little about it but I can navigate a Unix system pretty well).  Any help or advice would be much appreciated.  Also, I would be wiling to reinstall if needed. 
 
Thanks,
Josh

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