要了解个中原因，首先应了解文件系统数据结构以及如何进行磁盘分区。
To understand why, you should understand something about file system data structures and how partitions are placed on the hard disk.
在磁盘上，超块向内核提供关于磁盘上的文件系统的结构的信息。
On disk, the superblock provides information to the kernel on the structure of the file system on disk.
这包括物理体系结构、逻辑磁盘排列，以及逻辑卷和文件系统配置。
This includes the physical architecture, logical disk geometry, and logical volume and file system configuration.
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