Controllers; Overview And Requirements; Controller Overview - NetApp E5700 Manual

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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.
1
Attention LED
Note: The figure shows an example controller canister; the host ports on your controller canister
might be different.