Replace De6400 Or De6600 Battery; Step 1: Place Controller Offline - Lenovo ThinkSystem DE6400 Manual

you do not have access to the CLI, you can do one of the following:
For ThinkSystem System Manager (version 11.70.4 and above) — Download the CLI
package (zip file) from
operating system prompt, such as the DOS C: prompt.

2.2. Replace DE6400 or DE6600 battery

You can replace a battery in a DE6400 or DE6600 storage system.
About this task
Each controller canister includes a battery that preserves cached data if the AC power fails. If the
Recovery Guru in ThinkSystem System Manager reports either a Battery Failed status or a Battery
Replacement Required status, you must replace the affected battery.
Before you begin
• Verify that no volumes are in use or that you have a multipath driver installed on all hosts using
these volumes.
• Review the
Requirements for DE6400 or DE6600 battery
• Make sure you have the following:
◦ The replacement battery.
◦ An ESD wristband, or other antistatic precautions.
◦ A flat, static free work area.
◦ Labels to identify each cable that is connected to the controller canister.
◦ A management station with a browser that can access ThinkSystem System Manager for
the controller. (To open the System Manager interface, point the browser to the controller's
domain name or IP address.)

2.2.1. Step 1: Place controller offline

Back up data and place the affected controller offline.
Steps
1. 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.
2. From the Details area of the Recovery Guru, determine which battery to replace.
3. Back up the storage array's configuration database using ThinkSystem System Manager.
If a problem occurs when you remove a controller, you can use the saved file to restore your
configuration. The system will save the current state of the RAID configuration database, which
includes all data for volume groups and disk pools on the controller.
4
Lenovo Data Center Support and then issue CLI commands from an
replacement.