Create another module to declare a set of mapping attributes for the new elements that pointto the generic element types that they specialize.
创建另外一个模块,声明新元素的一组映射属性指向它们专门化的类属元素类型。
2
Logical volumes (LVs) pointto a set of specific PPs; a single LV can pointto up to three PPs for mirroring through the logical partitions (LPs) mapping.