MLX_CMD_ENQSYSDRIVE
mlx_enquire(sc, MLX_CMD_ENQSYSDRIVE, sizeof(struct mlx_enq_sys_drive) * MLX_MAXDRIVES,
case MLX_CMD_ENQSYSDRIVE:
mes = mlx_enquire(sc, MLX_CMD_ENQSYSDRIVE, sizeof(*mes) * MLX_MAXDRIVES, NULL);