Each single processing unit is a node canister, which is also called a node. The two nodes within the canisters make an I/O group that is attached to the SAN fabric.
At any one time, a single node canister in the system manages configuration activity. This configuration node manages a cache of the configuration information that describes the system configuration and provides a focal point for configuration commands. If the configuration node fails, another node canister in the system takes over its responsibilities.
| State | Description |
|---|---|
| Adding | The node canister was added to the clustered system but is not yet synchronized with the system state. The node canister state changes to Online after synchronization is complete. |
| Deleting | The node canister is in the process of being deleted from the system. |
| Online | The node canister is operational and is assigned to a cluster. |
| Offline | The node canister is not operational. Run the fix procedures to determine the problem. |
| Pending | The node canister is transitioning between states and, in a few seconds, will move to one of the other states. |