If PRIMARY fails, enable an application's group members on BACKUP1 to take over the workload of their group members on PRIMARY without operator intervention. This requires more processor storage resources than is available to BACKUP1, so MVS™ must obtain more storage.

Note that you must define the processor storage to the LPARs in such a way that the BACKUP1 LPAR can obtain the storage freed from PRIMARY. For information on how to do this, see PR/SM™ Planning Guide.