Specifies the type of security to be used as the default on the filer:
ntfs, which is exactly like Windows NT NTFS: files and directories have Windows NT file-level permission settings.
mixed, in which both NTFS and UNIX security are allowed: a file or directory can have either Windows NT or UNIX permissions.
unix, which is exactly like UNIX: files and directories have UNIX permissions.
Note that changing the default security style does not change existing files and directories, only newly created files and directories