Lenovo ThinkSystem DE Series Hardware Installation And Maintenance Manual page 109

Note: If you are accessing ThinkSystem System Manager using the controller you are
attempting to take offline, a System Manager Unavailable message is displayed. Select Connect
to an alternate network connection to automatically access ThinkSystem System Manager
using the other controller.
• To use script editor in the EMW:
1. Open the Enterprise Management Window (EMW) in ThinkSystem Storage Manager on your
local host.
2. Select the storage array.
3. Select Tools ➙ Execute Script.
4. Type one of the following commands in the text box.
For controller A: set controller [a] availability=offline;
For controller B: set controller [b] availability=offline;
5. Select Tools ➙ Verify and Execute.
The system attempts to take the controller offline.
Step 8. Wait for System Manager to update the controller's status to offline.
Attention: Do not begin any other operations until after the status has been updated.
Step 9. Select Recheck from the Recovery Guru, and confirm that the OK to remove field in the Details
area displays Yes, indicating that it is safe to remove this component.
Go to "Remove failed controller" on page 103.
Remove failed controller
You remove a controller canister to replace the failed canister with a new one. Perform this task only if your
storage array has two controllers.
Step 1: Remove controller canister
Remove the failed controller canister so you can replace it with a new one.
Before you begin
• You must use labels to identify each cable that is connected to the controller canister.
• You must have a #1 Phillips screwdriver.
• You have an ESD wristband, or you have taken other antistatic precautions.
Step 1. Put on an ESD wristband or take other antistatic precautions.
Step 2. Label each cable that is attached to the controller canister.
Step 3. Disconnect all the cables from the controller canister.
Attention: To prevent degraded performance, do not twist, fold, pinch, or step on the cables.
Step 4. If the controller canister has a HIC that uses SFP+ transceivers, remove the SFPs. Because you
must remove the HIC from the failed controller canister, you must remove any SFPs from the HIC
ports. However, you can leave any SFPs installed in the baseboard host ports. When you reconnect
the cables, you can move those SFPs to the new controller canister.
Step 5. Confirm that the Cache Active LED on the back of the controller is off.
Step 6. Squeeze the latch on the cam handle until it releases, and then open the cam handle to the right to
release the controller canister from the shelf.
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Chapter 3 Hardware replacement procedures
103