Changing the system topology

The system supports three system topologies. In a standard topology, the system is configured on a single site. Both the HyperSwap® and stretched system topologies are configured among multiple sites and are used for high availability and disaster recovery solutions. With the HyperSwap topology, I/O groups are configured at each site and require a license to the Remote Mirroring function. The stretched system topology splits the I/O group among each site, where each node in the I/O group is associated with a separate site. You can change the system topology from HyperSwap or stretched to a standard topology, but cannot directly change the system topology from HyperSwap to stretched, or vice versa. HyperSwap volumes must be removed or converted to basic volumes by deleting a copy before changing the topology, but stretched volumes do not need to be removed or changed in anyway.

Use the -topology parameter in the chsystem command to change the topology of the system. In the management GUI, select Monitoring > System. In the System Actions menu, select Modify System Topology.