NWCONFIG-X-484: Warning: NWCONFIG has detected that no disk mirroring has been configured. This is allowable, but not recommended, because disk mirroring is an important part of full mirrored-server fault tolerance.
Source: NWCONFIG.NLM
Explanation: Disk mirroring is an important part of full mirrored-server fault tolerance.
Action: Before continuing with NWCONFIG, establish disk mirroring.