HP HPE Alletra 2140 Hardware Manual page 69

Replacement controllers are shipped with empty PCIe cages and without an OCP card or power supplies installed.
Before installing the replacement controller, you must move the PCIe cage, OCP card, and power supplies from
the failed controller to the replacement controller.
Important:
Before you attempt to replace the controller:
Do not remove the failed controller until you are ready to install the replacement.
Verify that the replacement controller matches the part shown on the RMA work order.
Determine the state of the controllers and power supplies. 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. Prepare the failed controller for replacement.
a) Log in to the array using the CLI.
b) Determine whether the failed controller is in Standby mode.
ctrlr --list --array array_name
c) If the failed controller is in Active mode, perform a manual failover.
failover --array array_name
d) Verify that the manual failover placed the failed controller in Standby mode.
ctrlr --list--array array_name
e) Halt the standby controller.
halt --array array_name --controller {A | B}
Example
$ halt --array array123 --controller A
2. Remove the failed controller.
a) Disconnect the power cables from the power supplies of the standby controller.
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.
1 Thumbscrew
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.
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3 Controller
Maintenance Procedures 69