Hello,
I have just to tell you that I have a western digital 2 disk raid device (external) connected to my pc with a SATA cable (it goes into one of the sata ports INSIDE the pc).
This device has 2 HD and it is configured in a way that I see only 1 drive and the capacity that I see is the capacity of 1 of the 2 HD. (I think that it is called mirroring ... but I am not sure).
I use this disk for backup, BUT .... one time I tried to load a sonar song from it .... and I noticed that sonar was really working bad. It seems that the throughput was absolutely slow ... and I had to copy those songs to a "normal" (not raid) drive....
I am NOT an expert on raid ... but I noticed this thing....
Bye
Giorgio