CLI Guide

See also
show disk-groups
show disks
show maps
show pools
show vdisks
show redundancy-mode
Description Shows the redundancy status of the system.
Minimum role monitor
Syntax
show redundancy-mode
Output
Controller Redundancy Mode
Shows the system’s operating mode, also called the cache redundancy mode:
• Independent Cache Performance Mode: For a dual-controller system, controller failover is
disabled and data in a controller’s write-back cache is not mirrored to the partner controller. This
improves write performance at the risk of losing unwritten data if a controller failure occurs while there is
data in controller cache.
• 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 with independent cache: Both controllers are operational but are not mirroring their
cache metadata to each other.
• 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.
• Redundant: Both controllers are 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
Examples
Show the redundancy status of the system.
226 Alphabetical list of commands