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

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This procedure must be done with both controller canisters. Controller HIC
configurations must match exactly.
• Make sure you have the following:
◦ A SAS expansion card that is compatible with your controller.
◦ An ESD wristband, or you have taken other antistatic precautions.
◦ A flat, static free work area.
◦ A #1 Phillips screwdriver.
◦ 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.)

10.2.1. Step 1: Place controller shelf offline

Place the controller shelf offline so you can safely add the SAS expansion card.
Steps
1. From the Home page of ThinkSystem System Manager, ensure that the storage array has
Optimal status.
If the status is not Optimal, use the Recovery Guru or contact technical support to resolve the
problem. Do not continue with this procedure.
2. 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.
3. Ensure that no I/O operations are occurring between the storage array and all connected hosts.
For example, you can perform these steps:
◦ Stop all processes that involve the LUNs mapped from the storage to the hosts.
◦ Ensure that no applications are writing data to any LUNs mapped from the storage to the
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