What type of storage controller does the system have? If it is just the ICH10R then you won't get health data for it. The storage controller requires a CIM provider to be developed for ESXi that can get hardware health data for ESXi. ESXi included built in CIM providers for mainstream RAID controllers and manufacturers can provided CIM providers as well. But you won't see one (unless it is community developed) for a controller like the ICH10R.