Restoration can be performed by the Reverse function of EC or by OPC.
Restore by reversing EC
The Reverse operation of EC allows high-speed restoration of the pre-update data saved in the secondary destination back to the updated areas of the primary volume. (The Suspended copy session is reversed and then resumed.)
Restore by OPC
To perform restoration by OPC, define the OPC copy group and register a copy pair for the target volumes after stopping the EC session.
Then, start the OPC in the reverse direction.
The method using OPC has no advantage over the method using the EC reverse function in that a full copy is required. However, it has the benefit that the original volume can be used immediately after the logical copy has completed.
