Node canister rear panel indicators

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The node canister within the node has indicators that are visible from the back of the enclosure.

The back of the node canister has a set of indicators that identify the status of the node canister and its battery.

Figure 1. Rear view of the node
Rear view of the node

Node canister status LED indicators

The following table summarizes the meaning and values of the three node canister status indicators.

Table 1. Node canister status LED indicators
Name Color State Meaning
Power Green Off No power is available or power is coming from the battery.
Slow flash Power is available but the main processor is not running; this state is called standby mode.
Fast flash In self-test.
On Power is available and the system code is running.
Status Green Off The system code has not started. The system is off, in standby mode, or in self-test.
Flash The canister is in candidate or service state. It is not completing I/O operations. It is safe to remove the node.
Fast flashing The canister is dumping hardened data.
On The canister is active, able to complete I/O operations, or starting. The node is part of a cluster.
Node canister fault Amber Off The canister can function as an active member of the system. If the node canister has a problem, it is not severe enough to stop the node canister from completing I/O operations.
Flash The canister is being identified. There might also be a fault condition.
On The node is in service state or an error might be stopping the system code from starting. The node canister cannot become active in the system until the problem is resolved. Determine the cause of the error before you replace the node canister. The error might be due to insufficient battery charge. To resolve this error, wait for the battery to charge.

Battery status LED indicators

Each node canister also has a battery and two LED indicators for the battery status. If an AC power failure occurs, the battery provides power to the node canister as it stores cache and system data to an internal drive. This process is known as a fire hose dump. The following table describes the function and possible values for each indicator.

Table 2. Battery status LED indicators
Name Color State Meaning
Battery status Green Off The battery is not available for use. The battery might be missing or a battery fault was detected.
Fast flash The battery has insufficient charge to complete a fire hose dump.
Flash The battery has sufficient charge to complete one fire hose dump.
On The battery has sufficient charge to complete at least two fire hose dumps.
Battery fault Amber Off No fault. An exception to this would be where a battery has insufficient charge to complete a single fire hose dump.
On A battery fault was detected.