NWCONFIG-X-225: This segment exists on disk. Its size cannot be modified unless you delete and reassign it.

NWCONFIG-X-225: This segment exists on disk. Its size cannot be modified unless you delete and reassign it.

Source: NWCONFIG.NLM

Explanation: You are in the Volume Disk Segment List and are trying to edit the size or name of a segment that is already assigned.

Action: To rename a segment, go to the volume list and edit the volume parameters, changing the volume name.