Storage Spaces inside a Pool?

Drashna, would I make my system explode if I did the following:

Create a Storage Spaces Array 8TB x 6 - give it a drive letter then add that to a pool with duplication?

My goal is to have a fast, striped array for my media that I can write/read from but have that array duplicated automatically to the other remaining 3tb, 4tb, and 6tb drives.

If that would work, then how would this work:

I add a mkv file to my D drive, then copy it to the Storage Spaces Array lettered drive (that is inside a pool).  Would it then automatically duplicate via Drivepool to one of the other 3tb, 4tb, and 6tb drives?