Turning on the hardware and verifying operation
The hardware components must be turned on in a specific sequence to ensure correct communication between them.
The correct sequence is as follows:
Expansion Storage Shelves (if installed)
Note:
If there are multiple expansion shelves, you are required to power on the last shelf in the chain first and work back toward the head unit.
Primary Storage Shelf
Compute node(s)
To turn on the components and verify operation
- Verify that the following cables are connected properly and securely:
Ethernet cables between two nodes.
SAS cables between the compute node(s) and the Primary Shelf
SAS cables between the Primary Shelf and the Expansion Shelf
SAS cables between the Expansion shelves (if installed)
Power cords from each component to the appropriate Power Distribution Unit (PDU) sockets in the rack
- On the rear of the Expansion Shelf that is farthest from the compute node, turn on both power switches.
- Wait 2 minutes or 3 minutes for the shelf to initialize. The shelf is quieter when it has initialized.
- Verify that the Power OK LEDs on both power supplies are green.
Number
Description
1
PSU failure
2
AC failure
3
Power OK
- Verify that the Power on (standby) LED on the front, left, of the shelf is green.
- Turn on the next Expansion shelf and let it initialize.
Verify that the Power OK LEDs on the power supply modules are green.
Verify that the Power On LED on the control panel on the front of the shelf is green.
- If you have three Expansion shelves, turn on the third shelf.
Verify that the Power OK LEDs on the power supply modules are green.
Verify that the Power On LED on the control panel on the front of the shelf is green.
- Turn on the Primary Storage Shelf. Verify that the Power OK LEDs on the power supply modules are green.
Verify that the Power OK LEDs on the power supply modules are green.
Verify that the Power On LED on the control panel on the front of the shelf is green.
- Turn on the compute node with the power button on the front right side.
- Verify that the LED under the button is green.
