HPE Nimble Storage HF Series Hardware Manual page 136

Note: The new controller might take up to 45 minutes to appear in the user interface because some firmware
components on the new controller must be updated by the array OS.
Do not remove the controller during this period because interrupted firmware updates might render the hardware
non-functional.
If the controller takes longer than 45 minutes to report an Active/Standby state, contact HPE Support for assistance.
9. While still logged in to the array, perform a failover to the new controller.
Type failover array_name
10. Verify that the new controller is in Active mode.
ctrlr --list --array array_name
During the failover, the Standby controller first goes into solo mode and then into Active mode. The previously active
controller goes into unknown mode, then into Stale mode, and finally into Standby mode.
11. Repeat steps 2 through 8 to upgrade the other controller, now in Standby mode.
12. Verify that the model number of the array has changed.
shelf --array array_name --list
Look for Model in the list of information.
13. Return both replaced controllers using the RMA instructions that came with the upgrade kit.
Documentation Feedback: doc-feedback-hpe-storage@hpe.com
Upgrade Procedures 136