Each node canister within the control enclosure has indicators and ports that are
accessible from the back of the enclosure.
Ports on the node canisters
The control enclosure contains two node canisters. A label on the control
enclosure identifies each node canister and power supply unit (PSU). As Figure 1 shows, node canister 1 is on top and
node canister 2 is on the bottom. Because the node canisters are inverted, the location of the ports
and the numbering of the ports are oriented differently on each node canister. It is important to
remember this orientation when you are installing adapters and cables. Figure 1. Label showing the orientation of the node canisters and PSUs
Each node canister also has a dedicated technician port for service purposes.
Figure 2. Technician ports
1 Node canister 1 technician port
2 Node canister 2 technician port
Indicators on the node canisters
Figure 3 shows the back of a control
enclosure. Each node canister has its own set of indicators that identify the status of the node
canister and its battery.
Figure 3. Rear view of a control enclosure
Node canister status LED indicators
Figure 3 shows the location
of the LED indicators and Table 1 summarizes the meaning and values of each indicator.
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. Figure 3 shows the location of the
battery indicators and Table 2
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.
