4 Drives, 2 Raid-1 Clusters

[skip671]

Can this support using 4 drives but split into 2 different Raid-1 clusters?

I want to use this for 2 different functions. I want to mirror two 2TB drives for security NVR storage and mirror two 6TB drives for file server storage.

Can two separate clusters be set up on this or do all drives have to be part of a single raid cluster?