We have an issue that is popping up when trying to join a new server to our existing failover cluster. There are currently two servers in the cluster and we are trying to add a third. The error occurs during validation and is giving the error: "Failed when verifying removal of any persistant reservation on physical disk (unique identifier) at node (server name)." After we did this we noticed that it took one of our drives offline on that server and we had to bring it back online. Have any of you seen this before?