SMB Options to enable or disable interoperability
Read about options to enable or disable interoperability, that is, the options that control whether file access metadata is forwarded into the file system to make it available to other clients (POSIX, NFS, etc.) as well.
Leases, locking, and sharemodes
If your files are only accessed via SMB clients, the overhead that is incurred while ensuring consistency across multiple NAS protocols can be avoided if you disable the following interoperability options. This is recommended if the data in the file system is only accessed through the SMB protocol and not through other NAS protocols, such as NFS, FTP, HTTPS, or by POSIX clients.