Setting up FAST for the first time.  I have 3 policies: Gold - EFD 50%,  FC (Raid5) 50%, SATA 30%, Silver EFD 40%, FC 60%, SATA 20% and Bronze FC  50% and SATA 50%,  I have this in User Approved Mode, we do not use  host invisible devices, I've instead created a Storage group with  unmasked/unmapped hypers in each tier.  FAST has recommended promotions  to EFD, however my Bronze policy is not doing anything.  I want to see  some demotions recommended.  I have 6 Unix storage groups in the Bronze  policy.  At this rate, everything will be on a EFD from Gold and  Silver.  I had started the Bronze with 100% SATA and 20% FC but someone (EMC)  suggested I try 50/50.  Any ideas or suggestions?