The disk controller is reporting a critical status. This can cause a node outage and a cluster failover event.

This occurs when the disk controller is failing or is powered off.

For more details, view the component's controller_component_status property in the PDW Admin Console or query the sys.dm_pdw_component_health_status DMV.

Contact Microsoft Support and provide them with the alert name and details.

To diagnose this issue, Microsoft Support will require Windows administrator access to the affected PDW Host node in order to access the vendor’s integrated system user interface.

To resolve this issue, Microsoft Support will contact the vendor’s hardware support team. Depending on the problem, the vendor might require physical access to the appliance to replace the controller cables, the controller, or other hardware components.