Dell PowerVault ME5 Series Storage System CLI Reference Guide

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.

• 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.

• Operational: The controller is operational.
• Down: The controller is installed but not operational.
• Not Installed: The controller is not installed.

• Controller module serial number
• Not Available: The controller is down or not installed.

The operational status of the Management Controller in the partner controller. This is not factored into system health.

• Operational: The partner Management Controller is responding normally.
• Not Operational: The local Management Controller has established communication with the partner Management Controller, but the partner is not responding because it's not currently in active-active or failed-over state.
• Not Communicating: The partner Management Controller is not ready to communicate.
• Unknown: The operational status of the partner Management Controller cannot be determined.

Shows whether the system is ready for running a script.

• Ready: The system is ready.
• Not Ready: The system is not ready.

Shows the local controller's contribution towards System Ready.

• Ready: The local controller is ready.
• Storage Controller is Not Ready: The Storage Controller is not ready.
• Management Controller is Not Ready: The Management Controller is not ready.
• Activity is currently in progress: A partner firmware update, firmware installation, or log retrieval is in progress. Wait for that operation to complete and try again.

The explanation for Local Controller Ready.

Shows the partner controller's contribution towards System Ready.

• Ready: The partner controller is ready.
• Storage Controller is Not Ready: The Storage Controller is not ready.
• Management Controller is Not Ready: The Management Controller is not ready.
• Activity is currently in progress: A partner firmware update, firmware installation, or log retrieval is in progress. Wait for that operation to complete and try again.

The explanation for Other Controller Ready

# show redundancy-mode

status