This enables or disables the honoring of the share modes during a file open. These modes are used by clients to gain exclusive read or write access to a file. This is a deprecated option from old versions of Samba, and will be removed in the next major release. These open modes are not directly supported by UNIX, so they are simulated using shared memory. The share modes that are enabled by this option are the standard Windows share modes. This option gives full share compatibility and is enabled by default. You should NEVER turn this parameter off as many Windows applications will break if you do so. yes