Steps
1.
As the controller boots, check the controller LEDs and the seven-segment display.
The figure shows an example controller canister. Your controller might have a
different number and a different type of host ports.
When communication with the other controller is reestablished:
◦ The seven-segment display shows the repeating sequence OS, OL, blank to indicate that
the controller is offline.
◦ The amber Attention LED remains lit.
◦ The Host Link LEDs might be on, blinking, or off, depending on the host interface.
(1) Attention LED (amber)
(2) Seven-segment display
(3) Host Link LEDs (Controllers without two base-board ports on the rear do not have the
LEDs)
2.
Bring the controller online using ThinkSystem System Manager:
◦ From ThinkSystem System Manager:
i.
Select Hardware.
ii.
If the graphic shows the drives, select Show back of shelf.
iii.
Select the controller you want to place online.
iv.
Select Place Online from the context menu, and confirm that you want to perform the
operation.
The system places the controller online.
◦ Alternatively, you can bring the controller back online by using the following CLI commands:
For controller A:
set controller [a] availability=online;
For controller B: set controller [b] availability=online;
Notes:
14
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