Adding a copy to a volume
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.
Before you begin
The system supports mirrored copies for both standard topology, which consists of a single site, and HyperSwap® and stretched system topologies, which consist of multiple sites. Both HyperSwap and stretched system topologies are used for high availability configurations. However, in HyperSwap topologies, separate I/O groups are at each site. For stretched system, individual I/O groups are split between sites with each node in the I/O group at separate sites. If you are adding a mirrored copy to a volume used in a standard topology, use the addvdiskcopy command or the management GUI. For HyperSwap and stretched volumes, use the addvolumecopy. In the management GUI, select Volumes, right-click the volume, and select Add Volume Copies.