To create and manage device domains, you must have Option 41 (i5/OS™ - HA Switchable Resources) installed and a valid license key on your system.
You need to have this feature installed if you want to do any of the following in your clustered environment:
- Use the iSeries™ Navigator cluster management interface.
- Switch independent disk pools (independent ASPs) between systems.
Cross-site mirroring between geographically dispersed systems