Hello  Fast can be used on thick LUNS but will not do sub lun tiering.  Sub lun tiering will only work on Virtual Luns.  There is a white paper - FAST VP Thoery and Best Practices for Planning and Perfomance.  As per this document   "FAST operates on non-thin, or disk group provisioned, Symmetrix volumes. Data movements executed between tiers are performed at the full volume level. FAST VP operates on Virtual Provisioning thin devices." 
We are looking at buying a V-MAX to replace our DR DMX-4, but not our production DMX-4 (long, painful story).  Almost all of the data on the DMX-4 will be replicated to the V-MAX using SRDF/A.  I'm hoping to use FAST on the V-MAX where we can move portions of a storage device to SSD, fibre or SATA as necessary, but I'm currently getting a mixed message from our EMC rep.  We were first told that the V-MAX will not be able to use virtual provisioning as an R2 of a DMX and would thus only be able to do full lun migrations similar to Optimizer.  Then I was told that the V-MAX would be able to do the block level FAST.  Can a V-MAX do sub-lun migrations while using thick luns (no virtual provisioning)?
FAST on a V-MAX that is an SRDF pair of a DMX?