Controllers; Controller Overview; Requirements For Replacing Controller; Overview And Requirements - Lenovo ThinkSystem DE Series Hardware Installation And Maintenance Manual

Your battery replacement is complete. You can resume normal operations.

Controllers

A controller consists of a board, firmware, and software. It controls the drives and implements the System
Manager function. This section describes how to replace a controller in a controller shelf with two-controller
configuration.

Overview and requirements

Before you replace a controller you need to be aware of certain requirements and considerations.

Controller overview

Each controller canister contains a controller card, a battery, and an optional host interface card (HIC). You
can replace a failed controller.
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 ThinkSystem 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 controller

If you plan to replace a controller, keep the following requirements in mind.
• 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 have installed ThinkSystem 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 "Windows express configuration" on page 32, "VMware express configuration" on page 49, or "Linux
express configuration" on page 64 to download and install it.
100
ThinkSystem DE Series Hardware Installation and Maintenance Guide for 2U Enclosures