Turning on the hardware and verifying operation
You must turn on the hardware in the following order:
Expansion shelf
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 shelf
Compute node or nodes
Note:
The compute node automatically powers on when its cables are attached.
To turn on the hardware
- Verify that the following cables are connected properly and securely:
SAS cables between the Primary Shelf and the Expansion Shelf
SAS-3 cables between the compute nodes and the Primary Shelf
Power cords from each component to the appropriate Power Distribution Unit (PDU) sockets in the rack.
- On the rear panel of the Expansion shelf turn on both power supplies.
- Wait 2 or 3 minutes for the shelf to initialize. The shelf is more quiet when it has initialized.
- Verify that the Power OK LEDs on both power supplies are green.
Number
Description
1
Power supply 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 Primary Storage Shelf.
Let the shelf initialize for 2 or 3 minutes.
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.
- Connect the compute node to the Power Distribution Unit in the rack. The compute node will automatically turn on when the cables are connected to the PDU.
Note:
Follow this sequence to avoid unintended power-on behavior:
Turn off all switches.
Plug in all cables except the compute node cables.
Turn on all switches.
Plug in the compute node.
High availability (HA) appliance compute node and storage shelf service considerations
Attention: When you turn on the storage shelves and compute nodes after completing the service, turn on the primary compute node first before you turn on the secondary compute node.
Important: Check with the customer to determine which compute node is configured as the primary compute node, and which is configured as the secondary compute node. Do this before turning on the compute nodes and storage shelves.
