文件系统，从另一方面说，是驻留在分区之内的数据结构。
File systems, on the other hand, are data structures that reside inside partitions.
大多数文件系统将其数据结构与包含其本身的分区开头对齐。
Most file systems align their data structures to the beginning of the partitions that contain them.
mbr分区系统是一个数据结构补丁的大杂烩，用于克服早期的限制。
The MBR partitioning system is a hodge-podge of data structure patches applied to overcome earlier limits.
另一方面，对不一致数据结构的写操作需要磁盘的固件首先读取两个扇区，修改两个扇区的分区，然后写两个扇区。
Writes of misaligned data structures, on the other hand, require the disk's firmware to first read two sectors, modify portions of both sectors, and then write two sectors.
磁盘的第一个扇区专用于一个保护性MBR，它是一个法定 MBR数据结构，它定义一个单一分区类型0xEE (EFIGPT)。
The first sector of the disk is reserved for a protective MBR, which is a legal MBR data structure that defines a single partition of type 0xEE (EFI GPT).
Linux必须能够解析gpt数据结构，以便对磁盘包含的分区提供访问。
The Linux kernel must be able to parse GPT data structures in order to provide access to the partitions the disk contains.
分区是由磁盘上相邻扇区组成的容器，分区是由简单数据结构定义的。
Partitions are containers that consist of contiguous sectors on the disk; partitions are defined by simple data structures.
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.
如果文件系统数据结构正好与底层物理分区大小一致，对4096字节数据结构的读写会产生对单一扇区的读写。
If the file system data structures happen to align perfectly with the underlying physical partition size, a read or write of a 4096-byte data structure results in a read or write of a single sector.
现在了解过苹果分区的基本概念后，我们可以看一下数据结构。
Now that we have examined the basic concepts of an Apple partition, we can look at the data structures.
苹果分区可以描述任何的分区编号，而且数据结构位于硬盘上连续的扇区。
The Apple partition can describe any number of partitions, and the data structures are in consecutive sectors of the disk.
本部分将会大概介绍一下苹果分区，数据结构的细节，以及如何查看这些细节。
This section will give an overview of the Apple partitions, the details of the data structures, and discuss how to view the details.
数据结构也包含分区里的数据值，比如数据区的位置或其它启动代码的位置。
The data structure also contains values about data inside of the partition, such as the location of the data area and the location of any boot code.
苹果分区表包含了数块512字节的数据结构，每个分区使用一个数据结构。
The Apple partition map contains several 512-byte data structures, and each partition uses one data structure.
苹果分区表包含了数块512字节的数据结构，每个分区使用一个数据结构。
The Apple partition map contains several 512-byte data structures, and each partition uses one data structure.
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