If you want to retain the historical information about attribute values and alarms on a non-primary Admin Node that has failed, you can restore the Admin Node database from the primary Admin Node.
If an Admin Node fails, the historical information about attribute values and alarms that are stored in its Admin Node database are lost. When you recover the Admin Node, the software installation process creates a new database for the NMS service. After the recovered Admin Node is started, it records attribute and audit information for all services as if you had performed a new installation of the StorageGRID system.
If you restored a non-primary Admin Node, you can restore this historical information by copying the Admin Node database from the primary Admin Node (the source Admin Node) to the recovered node.