In this document we will explain how we will connect this SAN to ESX servers, the logical thing is that we have an MSA with two controllers (otherwise, It doesn't make much sense to invest so much, if we don't have redundancy in controllers), as well as two fiber switches on the back to have redundancy at the switch level as well. And on each ESX server we will place a couple of fiber optic HBA's, to which we will connect each HBA to a fiber switch to have a high availability system.