NWCONFIG-X-269: The system volume (SYS:) either is not mounted or does not exist.
Source: NWCONFIG.NLM
Explanation: The SYS: volume is either not mounted or not visible to NWCONFIG.
Action: Make sure that the volume is mounted, that all the necessary disk drivers are loaded, and that the disk is powered on. See Resolving Volume I/O Errors in the Traditional File Services Administration Guide..