1. A computer-implemented method for managing cluster node connectivity information, at least a portion of the method being performed by a computing device comprising at least one processor, the method comprising: maintaining a set of cluster nodes of a clustered application; for each node in a set of cluster nodes: determining a connectivity state of the cluster node; transmitting, from the cluster node to non-volatile Random Access Memory (“RAM”) of a cluster disk, connectivity information that indicates the connectivity state of the cluster node; accessing, from a remote system, the non-volatile RAM of the cluster disk to retrieve connectivity information of one or more cluster nodes from the set of cluster nodes; using the connectivity information to inform the remote system of the connectivity state of the one or more cluster nodes.