Controller offline
A controller was either manually placed offline or automatically placed offline after failing a diagnostic test.
Volumes owned by the offline controller are now temporarily owned by the online controller.
Write caching on volumes previously owned by the offline controller will be suspended until this problem is corrected.
If you did not manually place the controller offline, contact your Technical Support Engineer if you do not have a replacement controller available.
Before proceeding, ensure that the OK to remove field in the Details area indicates Yes. If No is displayed, it indicates that there is another component that must be serviced first. Always select Recheck prior to and after servicing a component to ensure that there aren't any new problems that may affect the component you plan to service.
Always use proper anti-static protection when handling components. Touching components without using a grounding wrist strap may damage the equipment.
Recovery Steps
Are any miswire problems being reported in the Problems area?
If yes, correct the miswire using the recovery steps in the miswire procedure listed in the Problems area before going to step 2. Resolving this problem while a miswire problem is present can lead to a loss of data accessibility.
If no, go to step 2.
Was the controller manually placed offline to replace the controller or a component inside the controller?
If the controller was not manually placed offline, go to step 3.
If the controller was placed offline to replace the controller, go to step 5.
If the controller was placed offline to replace a component inside the controller, go to step 10.
Contact your Technical Support Engineer to obtain a replacement controller. Do not go to step 4 until you have received the replacement controller.
Does the new controller's replacement part number match the replacement part number shown in the Details area?
If yes, go to step 5.
If no, contact your Technical Support Engineer to obtain a controller that matches the replacement part number in the Details area. Do not go to step 5 until you have received the correct controller.
Label each cable connected to the controller canister shown in the Details area.
Select the Save icon in the Recovery Guru to save the remaining steps to a file. These steps will no longer be accessible after you complete step 7.
Remove the controller.
Did you use a DHCP server to originally assign an IP address for the removed controller's management ports?
If yes, update the DHCP server to associate the removed controller's DNS/network and IP address with the ethernet address located on the replacement controller's Ethernet ID label, and then go to step 9.
If no, go to step 9.
Wait one minute, and then insert the new controller firmly into place and reconnect the cables. Then, go to step 15.
Label each cable connected to the controller canister shown in the Details area.
Select the Save icon in the Recovery Guru to save the remaining steps to a file. These steps will no longer be accessible after you complete step 12.
Remove the controller.
Replace the affected component inside the controller.
Wait one minute, and then re-insert the controller firmly into place and reconnect the cables.
Wait until the controller appears in the Hardware view, and then check that the controller is Optimal.
Go to the Hardware.
Highlight the affected controller shown in the Details area. The controller is located on the backside of the controller shelf.
Select View Settings. The controller's status is located in the Controller section.
Is the controller Optimal?
If yes, go to step 16.
If no, highlight the controller and select Place online. Then, go to step 16.
Redistribute all volumes back to their preferred owner.
Go to .
Select Redistribute volumes under More.
Select Recheck to ensure the problem has been resolved.