Full volume restores on volume pools can occasionally result in catalog integrity compromise when:

• Existing catalogs use ECS on the volume.
• Catalogs were previously accessed on the UCB of the target volume of the restore.

In these instances, before performing the full volume restore you must remove the catalogs fom the ECS structure using one of the following methods:

• Remove individual catalogs by name from the ECS structure using the MODIFY CATALOG,ECSHR(REMOVE,catname) command.

  Make sure that you do not issue any MODIFY CATALOG,ECSHR(AUTOADD) or MODIFY CATALOG,ECSHR(ENABLEALL) commands until after the restore is completed, because these commands reactivate the catalogs.

• Disconnect all systems from the coupling facility using the MODIFY CATALOG,ECSHR(DISCONNECT) command. Because this method might adversely affect system performance, do this only if you do not know the names of the affected catalogs.

If you do perform a full volume restore before removing the catalogs from the ECS structure, and systems accessing the catalogs are shut down, you must IPL those systems with AUTOADD disabled and then issue the MODIFY CATALOG ECSHR(REMOVE,catname) commands to remove the catalogs from ECS. Once this is complete, you can add catalogs to ECS.