Maintain and diagnosis cluster members from Cluster Management:

• web client: Navigate to Cluster > Cluster Management. 

When a node is selected in the Cluster view, the right of the pane displays details about the selected appliance. From this pane you can run the following maintenance and diagnostic tasks against the selected appliance.

• Unjoin: Click Unjoin to remove a replica from the cluster. For more information, see Unjoining replicas from a cluster..
• Failover: Click Failover to promote a replica to the primary appliance. For more information, see Failing over to a replica by promoting it to be the new primary..

• Activate: Click Activate to activate a read-only appliance so it can add, modify and delete data. For more information, see Activating a read-only appliance..

  CAUTION: Activating an appliance that is in Read-Only mode will take it out of the Read-only state and enable password and SSH key check and change for managed accounts. Ensure that no other SPP Appliance is actively monitoring these accounts, otherwise access to managed accounts could be lost.

• Diagnose: Click Diagnose to open the Diagnostics pane where you can perform the following:
  • View appliance diagnostics. For more information, see Appliance Diagnostics..
  • View appliance information. For more information, see Appliance Information..
  • Run diagnostic tests against the appliance. For more information, see Network Diagnostics..
  • View or edit networking settings. For more information, see Networking..
  • Perform a factory reset. For more information, see Factory Reset ..
  • Check OS licensing (virtual machine only). For more information, see Operating System Licensing..
  • Update patches. For more information, see Patch Updates..
  • Power down and restart the appliance. For more information, see Power..
  • Generate a support bundle. For more information, see Support bundle..
  • View or edit time settings. For more information, see Time..
• Check Health: Click Check Health to capture and display the current state of the selected appliance.
• Restart: Click Restart to restart the selected appliance. Confirm your intentions by entering a Reason and clicking Restart.

To fix more serious issues with a cluster, you can perform additional operations depending on the state of the cluster members. Some such operations include:

• Patching cluster members
• Using a backup to restore a clustered appliance
• Performing a factory reset
• Resetting a cluster that has lost consensus
• About Offline Workflow Mode