def mount_multifile(self):
mf = Multifile()
mf.open_read(Filename.from_os_specific('phase_1.ef'))
mf.set_encryption_flag(True)
mf.set_encryption_password(self.PW)
if not VirtualFileSystem.get_global_ptr().mount(mf, Filename('/'), 0):
raise Exception('Multifile could not be mounted.')
