Requirements for replacing a controller

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

Requirements for replacing a failed controller

Duplex configuration

For a controller shelf with two controllers (duplex configuration), 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 SANtricity System Manager displays Yes, indicating that it is safe to remove this component.