The Failover process for an unplanned outage in a synchronous PPRC configuration is the same as the process for a planned outage with the single exception that step 1, quiescing the application programs at the primary site, is unnecessary.
The Failback process for an unplanned outage is identical to the process for a planned outage.
Any step in either the Failover or Failback process for an unplanned outage may require repair action beyond the scope of PPRC, in which case the assistance of a service representative might be required.