Node canister ports and indicators

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
Orientation label
For example, Figure 2 shows the top node canister. On this canister, the numbering of the PCIe slots and ports goes from right to left. PCIe adapter slot 1 contains a 4-port 16 Gbps Fibre Channel adapter. PCIe slot 2 contains a 2-port 25 Gbps iWarp Ethernet adapter. PCIe slot 3 contains a 4-port 12 Gbps SAS adapter. The onboard Ethernet and USB ports are also shown.
Figure 2. Orientation of ports on node canister 1
Orientation of ports on node canister 1
Figure 3 shows the bottom node canister. This node canister has the same type and number of adapters installed. However, on the bottom canister, the numbering of the PCI slots and ports goes from left to right.
Figure 3. Orientation of ports on node canister 2
Orientation of ports on node canister 2

Each node canister also has a dedicated technician port for service purposes.

Figure 4. Technician ports
Technician ports
  •  1  Node canister 1 technician port
  •  2  Node canister 2 technician port

Indicators on the node canisters

Figure 5 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 5. Rear view of a control enclosure
Rear view of the control enclosure

Node canister status LED indicators

Figure 5 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 5 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.
On A battery fault was detected.