Clarifcation: You can uninstall the driver for the IDE channel the affected drive is on
and reboot and let Windows reinstall the driver for you. Also found out the probable cause for going back into PIO mode. Crappy scratched discs!! Every time you get
a cyclic redundancy error you count down to going to PIO. Six times moves you down
the tree from UDMA5 to 4, six more, to 3, and so forth. I've been getting lots of those lately by backing up damaged discs. Don't know if I got it all right, but I'll
be keeping closer watch on things from now on!