|Controllers|
Controllers
A controller consists of a board, firmware, and software. It controls the drives and implements the System
Manager functions. This section describes how to replace a controller in a duplex configuration.
Overview and requirements
This topic provides an overview of the controller and describes the requirements you need to know about
before replacing a controller or adding a second controller.
Controller overview
Each controller canister contains a controller card, a battery, and an optional host interface card (HIC).
Replace controller
When you replace a failed controller canister, you must remove the battery and HIC, if one is installed, from
the original controller canister, and install them in the replacement controller canister.
You can determine if you have a failed controller canister in two ways:
• The Recovery Guru in SANtricity System Manager directs you to replace the controller canister.
• The amber Attention LED on the controller canister is on, indicating that the controller has a fault.
Attention LED
Note: The figure shows an example controller canister; the host ports on your controller canister might be
different.
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
• 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.
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