When a dual-port HBA fails and takes down both ports in this configuration, the cluster behavior depends on whether the affected node is the current master for the multi-owner diskset.
If the affected node is the current master for the multi-owner diskset, the node does not panic. If any other node fails or is rebooted, the affected node will panic when it tries to update the replicas. The volume manager chooses a new master for the diskset if the surviving nodes can achieve quorum.
If the affected node is not the current master for the multi-owner diskset, the node remains up but the device group is in a degraded state. If an additional failure affects the master node and Solaris Volume Manager for Sun Cluster attempts to remaster the diskset on the node with the failed paths, that node will also panic. A new master will be chosen if any surviving nodes can achieve quorum.