Important:
• Controllers may only be serviced in Standby mode. Never remove a controller running in Active mode. You do not
have to shut down the array or expansion shelf to replace or add a component. The storage array can function
with one active controller while the component is added on the standby controller.
• Before removing a controller, address any power supply issues in the peer controller if the power supplies do not
show proper operational status (green LED). For HPE Alletra 6030 and 6050 arrays with 800 W power supplies,
this precaution is critical.
Procedure
1. Identify and halt the controller that is in Standby mode.
a) Log in to the array using the CLI.
b) Determine which controller is in Standby or Unknown mode.
ctrlr --list --array array_name
c) Halt the standby controller.
halt --array array_name --controller {A | B}
2. Remove the controller from the chassis.
a) Disconnect the power cords from the two controller power supplies.
b) Label all cables to ensure proper recabling later, then remove them from the controller.
c) Loosen the left and right thumbscrews to free the controller release levers from the controller.
31 ControllerThumbscrew
2 Controller release lever
d) Pull the controller release levers down until they stop. The controller ejects slightly from the chassis.
e) Supporting the weight of the controller, pull the controller release levers to slide the controller out of the chassis. Then
place the controller on a flat surface.
Maintenance Procedures 77
Documentation Feedback: doc-feedback-hpe-storage@hpe.com
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