HP MSA 1040 HP MSA 1040 CLI Reference Guide (762782-001, March 2014) - Page 268

show redundancy-mode Description Shows the redundancy status of the system. Syntax show redundancy-mode Output Controller Redundancy Mode Shows the system's operating mode, also called the cache redundancy mode: • Active-Active ULP: Both controllers are active using ULP (Unified LUN Presentation). Data for volumes configured to use write-back cache is automatically mirrored between the two controllers to provide fault tolerance. • Single Controller: The enclosure contains a single controller. • Failed Over: Operation has failed over to one controller because its partner is not operational. The system has lost redundancy. • Down: Both controllers are not operational. Controller Redundancy Status • Redundant: Both controllers are operational. • Operational but not redundant: In active-active mode, one controller is operational and the other is offline. In single-controller mode, the controller is operational. • Down: This controller is not operational. • Unknown: Status information is not available. Controller ID Status • Operational: The controller is operational. • Down: The controller is installed but not operational. • Not Installed: The controller is not installed. Controller ID Serial Number • Controller module serial number • Not Available: The controller is down or not installed. Other MC Status The operational status of the Management Controller in the partner controller. This is not factored into system health. • Operational • Not Operational • Not Communicating • Unknown Example From either controller, show the redundancy status of a dual-controller system where both controllers are operating: # show redundancy-mode System Redundancy Controller Redundancy Mode: Active-Active ULP Controller Redundancy Status: Redundant Controller A Status: Operational Controller A Serial Number: SN Controller B Status: Operational Controller B Serial Number: SN Other MC Status: Operational Success: Command completed successfully. (2012-01-18 11:02:36) 268