In this scenario is it possible to use the VMWARE HA and FT - Features
As long as you present the same LUNs to both hosts, which is possible in this scenario, then yes, it shouldn't be a problem to use cluster features like HA/FT and vMotion/DRS/DPM.
you have a redundancy on the Host-side and of the Storage-side
No. As long as you don't have some sort of replication between your P2000s you only have a redundancy on the host side in this scenario. If one P2000 dies, so will the LUNs and VMs sitting on this node. Since there is no other copy of the data you can't restart these VMs until you get the P2000 back up (or restore some backups on the surviving P2000).