First complete data copy in progress, and then take action for the storage node failure. Perform all steps up to step 26 in Performing data migration. Verify the health status with the VSP One SDS Block Administrator, and verify where the failure occurred. Take action for the storage node failure. After taking action, verify the event log to make sure that the faulty storage node is rebuilt. Verify the progress of the Rebuild operation. If the Rebuild operation is still in progress, wait until it is completed. After making sure that the Rebuild operation is completed, go to the next step. Resume from step 27 in Performing data migration.