I am rebuilding a vSphere 5.1 environment to 6.5. I will be doing an upgrade will be shutting each host down individually rebuilding it to 6.5 and then adding to the 6.5 vCenter. The 5.1 environment has a direct attached storage area network all drives are shared between all four hosts obviously. My question is when I upgrade a host to 6.5 will the storage need to be upgraded at that time or can I keep it in a state where it can be read by both the 5.1 environment and the 6.5 environment?
Has anybody done this?