Recovering From Total Power Loss

In Sun Cluster configurations with a single power source, a power failure takes down all Sun Cluster nodes along with their multihost disk expansion units. When all nodes lose power, the entire configuration fails.

In a total-failure scenario, there are two ways in which the cluster hardware might come back up.

• A Sun Cluster node reboots before the Terminal Concentrator. Any errors reported when the node is rebooting are stored in the /var/adm/messages file or the error log pointed to in the /etc/syslog.conf file.

• A Sun Cluster node reboots before the multihost disk expansion unit. The associated disks will not be accessible. One or more nodes must be rebooted after the multihost disk expansion unit comes up. Once the nodes are up, run the hastat(1M) command and use your volume management software to search for errors that occurred due to the power outage.