If you plan to replace a controller or add a second controller, keep the
following requirements in mind.
Requirements for replacing a failed controller
- You must have a replacement controller canister with the same part number as the controller canister you are replacing.
- You have an ESD wristband, or you have taken other antistatic precautions.
- You must use labels to identify each cable that is connected to the controller canister.
- You must have a #1 Phillips screwdriver.
- You must have installed SANtricity Storage Manager on a management station, so you can use the storage array's command line interface (CLI).
If this software has not yet been installed, follow the instructions in the Linux express configuration, Windows express configuration, or VMware express configuration to download and install it.
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.