For further details about array firmware, storage product configurations and best practices, please contact the storage vendor.
Storage Virtual Appliance:
OS Release Details
VMware Product Name :
Attention: Storage partners using ESX 4.0 or later may recommend VMW_PSP_RR for path failover policy for certain storage array models. If desired, contact the storage array manufacturer for recommendation and instruction to set VMW_PSP_RR appropriately.