Lenovo ThinkSystem DE6400 Manual

Also see for 7DB6: Manual

4. Confirm that the replacement part number for the failed controller is the same as the FRU partnumber for the replacement controller.Possible loss of data access — If the two-part numbers are not the same,do not attempt this procedure. In addition, if the failed controller canisterincludes a host interface card (HIC), you must install that HIC into the newcontroller canister. The presence of mismatched controllers or HICs causesthe new controller to lock down when you bring it online.5. 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 yourconfiguration. The system will save the current state of the RAID configuration database, whichincludes 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--.7z.6. If the controller is not already offline, take it offline now using ThinkSystem System Manager.a. Select Hardware.b. If the graphic shows the drives, select Show back of shelf to show the controllers.c. Select the controller that you want to place offline.d. From the context menu, select Place offline, and confirm that you want to perform theoperation.If you are accessing ThinkSystem System Manager using the controller youare attempting to take offline, a ThinkSystem System Manager Unavailablemessage is displayed. Select Connect to an alternate network connectionto automatically access ThinkSystem System Manager using the othercontroller.7. Wait for ThinkSystem System Manager to update the controller’s status to offline. Do not begin any other operations until after the status has been updated.8. Select Recheck from the Recovery Guru, and confirm that the OK to remove field in theDetails area displays Yes, indicating that it is safe to remove this component.14