Chapter 3. Hardware replacement procedures
This section provides installation and removal procedures for all serviceable system components. Each
component replacement procedure references any tasks that need to be performed to gain access to the
component being replaced.
Batteries
A battery is included with a controller canister and preserves cached data if the AC power fails.
Overview and requirements
Before you replace a battery, you need to be aware of certain requirements and considerations.
Battery overview
Each controller canister includes a battery that preserves cached data if the AC power fails. To protect your
data, you must replace a failed battery as soon as possible.
Recovery Guru alerts
If the Recovery Guru in ThinkSystem System Manager reports one of following statuses, you must replace
the affected battery:
• Battery Failed
• Battery Replacement Required
From ThinkSystem System Manager, review the details in the Recovery Guru to confirm that there is an issue
with a battery and to ensure no other items must be addressed first.
Do the following steps to replace a battery if you have two controllers:
1. Take controller offline.
2. Remove the controller canister.
3. Replace the battery.
4. Replace the controller canister.
5. Bring the controller online.
Requirements for replacing a failed battery
If you plan to replace a failed battery, keep the following requirements in mind.
• 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.
• You must have a replacement battery.
• You have an ESD wristband, or you have taken other antistatic precautions.
• You should use labels to identify each cable that is connected to the controller canister.
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