Changing the system topology

You can use the command-line interface or the management GUI to change the system topology.

The system supports two system topologies. In a standard topology, the system is configured on a single site. The HyperSwap topology is configured among multiple sites and is used for high availability and disaster recovery. In this topology, I/O groups are configured at each site and require a license to the Remote Mirroring function. HyperSwap volumes must be removed or converted to basic volumes by deleting a copy before changing the topology.

Note: The HyperSwap function is supported on Lenovo Storage V5030 and Lenovo Storage V5030F systems.

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

To change the system topology from a HyperSwap topology to a standard topology, enter the following command:
```
chsystem -topology standard
```
To verify that the site definitions have been removed from the enclosure, enter this command:
```
lsenclosure
```
If either the site_id or site_name parameters are listed, remove the site definitions from the node by using the chnodecanister command.