X-bit labs has a thorough look at Promise's FastTrak100 TX4 IDE RAID Controller card, so if a 4 channel RAID sound up your alley then go and check it out.
To begin with I would like to say that FastTRAK100 TX4 controller has been available in the market for quite a long time already (if I am not mistaken, it has been out for about a year now). Why did it happen so that I am writing about this controller only now? The story is really very exciting. When I tried this controller for the first time (it was last year), I faced some weird problems, which didn't comply with any logics. Firstly, the controller didn't show any "correct" results, and secondly, it didn't work with some mainboards.... Some time passed, I pulled myself together and decided to repeat the experiment, and.... Thank goodness, it worked! By that time we already had HighPoint controller at hand, so....More information at X-bit labs