Draft Document for Review February 7, 2020 3:15 pm 8464ch07_Upgrade.fm A copy consistency check is run at the beginning of the process. Do not skip  consistency checks unless it is a disaster recovery (DR) unjoin or you can account for  why a volume is inconsistent. Failure to perform this check can result in data loss when  the only valid copy was present on the removed cluster. Note:  Consult with your IBM SSR for the code version prerequisites for FC4016. After a cluster is removed, you might want to modify the host configuration to remove  the LIBPORT IDs that are associated with the removed cluster. Chapter 7. Hardware configurations and upgrade considerations  295