Direction of data flow

Under normal operating conditions, the natural direction of data flow is from the primary volume group to the secondary volume group. Remote Copy replicates data from primary volume groups on the primary system to secondary volume groups on the secondary system.

Under the following circumstances, temporarily switch the direction of data flow:

• Disaster recovery

• System maintenance/replacement

• Scheduled downtime

Switching the direction of data flow reverses the replication direction of the volume groups.