256 Implementing the IBM Storwize V7000 with IBM Spectrum Virtualize V8.2.1
/SM590000HyperSwap topology, which is a three-site HA configuration in which each I/O group is at 
a different site. A volume can be active on two I/O groups so that if one site is not 
available, it can immediately be accessed via the other site. 
The Create Volumes menu provides the following options, depending on the configured 
system topology:
/SM590000With standard topology, the available options are: Basic, Mirrored, and Custom.
/SM590000With HyperSwap topology, the options are: Basic, HyperSwap, and Custom.
To start the process of creating a volume, navigate to the Volumes menu and click the 
Volumes option of the IBM Spectrum Virtualize GUI, as shown in Figure 7-8.
Figure 7-8   Volumes menu
A list of volumes, their state, capacity, and associated storage pools, is displayed.
Note: Multi-site topologies of IBM Spectrum Virtualize use two sites as component 
locations (nodes and back-end storage), and a third site as a location for a tie-breaker 
component that is used to resolve split-brain scenarios where the storage system 
components lose communication with each other.
For more information about enhanced stretched cluster and HyperSwap, see the white 
paper IBM Spectrum Virtualize HyperSwap configuration, WP102538.