You can start or stop the Samba server automatically (during boot) or manually. Starting and stopping policy is a part of the YaST Samba server configuration described in Section 27.4.1, “Configuring a Samba Server with YaST”.
To stop or start running Samba services with YaST, use + and check winbind, smb, and nmb. From a command line, stop services required for Samba with rcsmb stop && rcnmb stop and start them with rcnmb start && rcsmb start; rcsmb cares about winbind if needed.