just a comment -
i have a promise fasttrack 66 with 2 maxtor drives (66/20gig/7200). well it works fine under win2k - but the performance is about HALF of the performance unter nt4!!!
a friend of mine has the same problem (25 mb/sec. max instead of 40-50 mb/sec max. transfer under winbench)...
let's hope that this issue will be solved in their next drivers (and soon!!!).