The final component for allocation is the cluster map.
分配的最后组件是集群映射。
With a PGID and the cluster map, you can locate any object.
有了PGID和集群映射,您就可以定位任何对象。
Cluster map scanning is necessary to ensure that no data on the outer volume will be overwritten by the hidden volume.
簇状图扫描是必要的,这可以确保外层卷的数据不会被隐藏卷覆盖。