How to change Ceph Data replication

Story: We had bought a new hard disk to add in to our storage pool

Connect to controller

$ ssh [email protected]
Warning: Permanently added '192.168.1.x' (ECDSA) to the list of known hosts.
Password:

Change the replication with CLI storage> rebalance

controller> storage
controller:storage> rebalance
Input replication factor(1/2/3): 2