Server on different datacenter able to have read and write access on a LUN on another data center

Hi, Everyone. 

Hope you can help us with our setup.

Scenario: We have 2 data center (DC1 and DC2). We have VMware 7.0 farm on both DC. We are trying to setup WFSC across DC (DC1clusternode1 and DC2clusternode2). We have created shared disk local in each data center which is accessible (w/r) on local cluster node. 

My question is how can we make DC2 be able to r/w on the shared disk which located on DC1 and vice versa. Because we cannot proceed with the cluster setup if nodes cannot w/r on the shared disks on both data center