Step 1: Place The Controller Offline - Lenovo ThinkSystem DE6400 Manual

• Make sure you have the following:
◦ HICs that are compatible with your controllers.
◦ An ESD wristband, or you have taken other antistatic precautions.
◦ A flat, static free work area.
◦ Labels to identify each cable that is connected to the controller canister.
◦ A #1 Phillips screwdriver.
◦ 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.)
Possible loss of data access — Never install a HIC in a DE6400 or
DE6600 controller canister if that HIC was designed for another DE-Series

controller. In addition, both controllers and both HICs must be identical.
The presence of incompatible or mismatched HICs causes the controllers
to lock down when you apply power.

7.3.1. Step 1: Place the controller offline

Place the affected controller offline so you can safely replace the HICs.
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.
◦ From System Manager:
a. Select Support › Support Center › Diagnostics.
b. Select Collect Configuration Data.
c. Click Collect.
The file is saved in the Downloads folder for your browser with the name,
configurationData-<arrayName>-<dateTime>.7z.
4. If the controller is not already offline, take it offline now using ThinkSystem System Manager.
a. Select Hardware.
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