I am adding two hosts to an existing cluster, they are running off of Shared SAN storage with ISCSI connections. On both of the new hosts I have connected it to the SANS and rescanned the storage. All the LUNS show up but two datastores are missing from the datastore view, other datastore's show up. The missing datastores do show up on the original host. We are running vsphere 5.1 update 2 and both missing datastores are 2TB. Any thoughts?
First thing I would double check is that the host with the missing datastores has access the the corresponding LUNs on your storage array (storage groups)