If you have FC drives of both RAID5 and RAID1 in the same FAST policy, they will be treated the same.  It is not recommended.   Using RAID1 for the middle tier is highly recommended.
The drives are same rpm on both disk groups/pools, r5 and r1. Is the code smart enough to move write intensive load to r1 drives? Or someone point me to a documentation how FAST promotes and demotes workload based drive type, raid type, etc.  TIA.
FC R5 and FC R1 in FAST VP