VNX 5300 - An error occurred while accessing the storage pool

Hi Team , 

We had power failure issue on VNX 5300 storage after power failure .Controller 2 found faulty . Now cntrl 2 replaced and now we are getting below error .Unable to make storage pool online 

Error message :

"An error occurred while accessing the storage pool 

Please resolve any hardware problems and retry the operation (0x712D8514)"

Please any body faced this type of issue  and provide us some solution

Regards

Sebastian