Chassis Management

The Chassis Manager page displays the real-time status of each hardware component in the appliance (in the SMC, go to Manage > Chassis). You can use this page to monitor the current state of the appliance and investigate error conditions.
Note: Your Yellowbrick appliance may be a single-chassis or dual-chassis system. The examples in this section describe a dual-chassis system.
The Chassis Manager page has four main tabs.

Compute Blades

This tab provides a graphical view to assess the overall status of each compute blade on each chassis in the appliance, with information on both the physical status and power status:

Each vertical image displays the status of a single compute blade as it is physically inserted into an appliance chassis. This example shows a dual-chassis appliance. Each compute blade image provides information on its physical state, power status, light status, and software configuration status.

Physical Status and Power Status

The graphical image of the compute blades provides information on both the physical status and power status:

Graphic Physical Status Power Status
Image as shown above Blade inserted On
Image above with dark gray background Blade inserted Off
Image above as yellow Blade inserted, powered on, being updated to match the cluster version level On
Flat gray image (no graphic) No blade inserted N/A

LED Light Status

At the top of each compute blade image, the LED light status is shown. This status matches the physical LED lights that are visible when you look at the front of the appliance itself. Each blade has three LED lights: green, red, and blue. The states of each light are: Off, On, Fast blink, Slow blink. The meaning of each light status is as follows:

LED Light Status Description
All off Power off
All fast blinking Power on, blade starting
All slow blinking Power on, OS or software worker booting
Green on Power on, booted
Red on Hardware error
Blue on Beacon activated

During normal operation, the green LED light is on. If the compute blade experiences a hardware error, the red LED light will turn on.

The blue LED light is a beacon light for administration purposes. Administrators can manually turn the blue beacon light on or off in either the Cluster Manager SMC page or by using the ybcli blade command. Turning on the beacon light visually indicates which compute blade needs servicing or replacement, avoiding operator errors during service events.

Note: On the real physical compute blades, there is an additional LED light at the bottom of each blade. This light, when flashing, indicates storage I/O activity. However, on this SMC page the light is shown statically as always on and simply shows the light’s physical position.

Compute Blade Software Status

The graphical box below each compute blade (the green boxes in the screen capture) provides information on the software status for each blade. There are two indicators: the color of the box and the icon that is shown.
Color Indicator
Color Description
Green Software worker online
Red Software worker in error state
Dark gray Software worker offline
Light gray Compute blade physically removed
Blue New compute blade physically inserted but not added to the cluster
Icon Indicator
Icon Description
Circle with checkbox Software worker registered OK
Circle with no checkbox Software worker registered as spare
Circle with X Cluster unable to communicate with software worker on compute blade
Triangle with ! Software worker in error state


This tab shows the status of each fan in the appliance.

The appliance has 5 fan slots that are hot-swappable, and each fan slot contains 2 fans. Fans are redundant and provide n+2 protection by slots. For example:

The following table describes the information on the Fans tab:
Column Description
Name The physical fan slot
Chassis Chassis number (0 or 1).
Status Current status
Error Reason Description if in error state
Fan 0 Usage % For the 1st fan, the current % of max RPM
Fan 0 RPM For the 1st fan, the current RPM
Fan 1 Usage % For the 2nd fan, the current % of max RPM
Fan 1 RPM For the 2nd fan, the current RPM

Power Supplies

This tab shows the status of each power supply in the appliance. Appliances may have 2 to 4 power supplies per chassis depending on the number of compute blades that are installed. Power supplies are redundant and provide n+2 protection in 15-node configurations. Information on the status, manufacturer and model, and current power consumption, amps, and voltages is provided. For example:

Additionally, the current power consumption of the appliance is summarized at the top of the page. This power consumption is just for the compute blade chassis and does not include power drawn from the two manager nodes.


This page shows the status of each internal InfiniBand switch in the appliance. Appliances contain 2 HA redundant InfiniBand networks per chassis, with one in the active state and the other in standby state. The status, error reason, IP address, and port connections to each blade are listed. For example: