I recently installed for the first time PernixData FVP at a customer. He has three HP Proliant DL380 G7 servers, each one with an integrated Smart Array P410i disk controller. There are some suggested configurations coming from Pernix in order to optimize the usage of SSDs, and if you are one of their costumers there is a technical document you can request. Some of these steps and configurations are really useful anytime you are going to use SSDs on ESXi.