Requirements for replacing controller

If you plan to replace a controller, keep the following requirements in mind.

Two-controller configuration

If the controller shelf has two controllers, you can replace a controller canister while your storage array is powered on and performing host I/O operations, as long as the following conditions are true:
  • The second controller canister in the shelf has Optimal status.
  • The OK to remove field in the Details area of the Recovery Guru in ThinkSystem System Manager displays Yes, indicating that it is safe to remove this component.