You can unload the NFS Gateway using either iManager or the command line.
The NFS Gateway Properties page lets you stop the NFS Gateway.
On the NFS Gateway Properties page, click Stop to stop the NFS Gateway. The NFS Gateway status changes from Running to Stopped.
Unload NFS Gateway services by entering gystop at the console prompt.
IMPORTANT:When you use this command, the system stops NFS Gateway services without asking for any confirmation even if files in any of the gateway volumes are open.