dos filetimes (S) Under DOS and Windows, if a user can write to a file they can change the timestamp on it. Under POSIX semantics, only the owner of the file or root may change the timestamp. By default, Samba runs with POSIX semantics and refuses to change the timestamp on a file if the user smbd is acting on behalf of is not the file owner. Setting this option to yes allows DOS semantics and smbd 8 will change the file timestamp as DOS requires. Default: dos filetimes = no