def METHOD_NAME(self):
    '''
    dlpar add operation
    '''
    cmd = "ioscli mkvdev -vdev %s -vadapter %s -dev %s" % (self.hdisk_name,
                                                           self.host,
                                                           self.vscsi)
    output = self.session.cmd(cmd)
    self.log.info(output.stdout_text)
    if output.exit_status != 0:
        self.fail("Failed dlpar add operation")