
e. On the Base tab, make a note of the Replacement Part Number for the controller.
4. Confirm that the replacement part number for the failed controller is the same as the FRU part number 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 canister includes a host interface card
(HIC), you must install that HIC into the new controller canister. The presence of
mismatched controllers or HICs causes the new controller to lock down when you bring it
online.
5. Back up the storage array’s configuration database using SANtricity 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.
6. If the controller is not already offline, take it offline now using SANtricity 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 the operation.
If you are accessing SANtricity System Manager using the controller you are attempting to
take offline, a SANtricity System Manager Unavailable message is displayed. Select
Connect to an alternate network connection to automatically access SANtricity System
Manager using the other controller.
7. Wait for SANtricity 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 the Details area
displays Yes, indicating that it is safe to remove this component.
Step 2: Remove failed controller
Remove a controller canister to replace the failed canister with a new one.
This is a multi-step procedure that requires you to remove the following components: battery, host interface
card, power supply, DIMMs, and fans.
12