You can use the management GUI or command-line interface (CLI) to add a mirrored copy to a volume. Each volume can have a maximum of two copies.
The system supports mirrored copies for both standard topologies, which consist of a single site, and for HyperSwap topologies, which consists of multiple sites. The HyperSwap topology is used for high availability and disaster recovery scenarios. If you are adding a mirrored copy to a volume used in a single system, use the addvdiskcopy command or the management GUI. For HyperSwap volumes, use the addvolumecopy. In the management GUI, select Volumes, right-click the volume, and select Add Volume Copies.