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.
一个配置文件包含一个配置文件类别结构，这个结构分隔存储在上下文区域中的数据，类似于磁盘上的文件夹结构。
A profile contains a hierarchy of profile categories, which split up the data that you can store into contextual areas, similar to a folder structure on disk.
您可能会疑惑，如果文件系统只是一个庞大的树形结构，那么磁盘布局为什么如此重要。
You might wonder why disk layout is important if the filesystem is just one big tree.
64位数据结构；支持大量文件、大文件和大磁盘。
64-bit data structures; support many files, large files and disks.
更快的文件系统检查Ext4添加了新的数据结构，允许fsck在检查中跳过磁盘中未使用的部分，因此加快了文件系统的检查。
Faster file system checks Ext4 adds data structures that permit FSCK to skip unused parts of the disk in its checks, thus speeding up file system checks.
该方法采用磁盘日志和内存日志的结构，通过对事务的管理，能满足集群文件系统中元数据高可用性的要求。
This method used the structure of disk journal and memory journal, and adopted a mechanism of transaction, so it could meet the request of high availability in file system metadata.
主要分析了抽象语法树(ast)，讨论了磁盘文件的结构及ast的写入和复原技术。
With the emphasis on the abstraCt syntax tree (AST), the paper also discusses the structure of a disk file as well as the functions designed for saving and recovering the AST.
计算机虚拟存储体系结构中磁盘文件访问存在局部性，大量访问集中在少数文件上。
Disk file accesses are localized just like RAM access localization in the virtual memory architecture. Most file accesses localize few files.
NTFS磁盘结构层处理NTFS文件系统磁盘结构。
NTFS structure layer handles the structure of NTFS filesystem.
NTFS磁盘结构层处理NTFS文件系统磁盘结构。
NTFS structure layer handles the structure of NTFS filesystem.
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