N5200BPRO and 10 drives

I just got my N5200BPro and five WD2500KS and i have configuring it as a raid-5....

Now i have three Seagate 200GB drives (old ones) and two brand new WD5000AAKS unused.

How to make the best of it??

My ide was to buy a DAS for the two WD5000AAKS and us it as a backup to the N52000BPro..

But still i have have the three old Seagate 200GB drives.... What to do with them??

Any other ideas????? :stupid:

My N5200BPro came from the factory with firmware 2.00.00 installed :eek:

Peter in Bangkok