Primary partition, also known as primary partition, is a type of partition like extended partition and logical partition. No other types of partitions can be partitioned in the primary partition, so each primary partition is equivalent to a logical disk.
主分区，也称为主磁盘分区，和扩展分区、逻辑分区一样，是一种分区类型。主分区中不能再划分其他类型的分区，因此每个主分区都相当于一个逻辑磁盘（在这一点上主分区和逻辑分区很相似，但主分区是直接在硬盘上划分的，逻辑分区则必须建立于扩展分区中）。早期 MBR 模式分区只能划分四个分区，现在的 GPT 分区至少可以划分 128 个主分区，未来很有可能将不存在扩展分区和逻辑分区的概念。
Primary partition, also known as primary partition, is a type of partition like extended partition and logical partition. No other types of partitions can be partitioned in the primary partition, so each primary partition is equivalent to a logical disk (in this regard, the primary partition is similar to the logical partition, but the primary partition is directly partitioned on the hard disk, and the logical partition must be established in the extended partition). In the early MBR mode, the partition can only be divided into four partitions, while the GPT partition can be divided into at least 128 primary partitions. In the future, the concepts of extended partition and logical partition will probably not exist.
The primary partition of a hard disk contains the files and data necessary for the startup of the operating system. To install the operating system on the hard disk, the hard disk must have a primary partition.
主分区是一个比较单纯的分区，通常位于硬盘的最前面一块区域中，构成逻辑 C 磁盘。其中的主引导程序是它的一部分，此段程序主要用于检测硬盘分区的正确性，并确定活动分区，负责把引导权移交给活动分区的 DOS 或其他操作系统。此段程序损坏将无法从硬盘引导，但从软驱或光驱引导之后可对硬盘进行读写。
The primary partition is a relatively simple partition, usually located in the front area of the hard disk, forming a logical C disk. The main boot program is a part of it, which is mainly used to detect the correctness of hard disk partition and determine the active partition. It is responsible for transferring the boot right to DOS or other operating systems of the active partition. If this program is damaged, it will not be able to boot from the hard disk, but after booting from the floppy or optical drive, the hard disk can be read and written.
在 MBR 分区模式中，硬盘只能分 4 个分区，而 4 个分区肯定不够用，所以就催生了扩展分区和逻辑分区的概念，而之前的分区类型便起名为主分区了。实际上在早期的硬盘分区中并没有主分区、扩展分区和逻辑分区的概念，每个分区的类型都是现在所称的主分区。
In MBR partition mode, the hard disk can only be divided into four partitions, and four partitions are definitely not enough. Therefore, the concept of extended partition and logical partition is born. The former partition type is named as main partition. In fact, in the early hard disk partition, there was no concept of primary partition, extended partition and logical partition. Each partition type is now called primary partition.
关于 MBR 与 GPT
On MBR and GPT
MBR，全称为Master Boot Record，即硬盘的主引导记录。
MBR, fully known as master boot record, is the master boot record of the hard disk.
Generally, when it is associated with partition, it will represent a partition system.
由于硬盘的主引导记录中仅仅为分区表保留了 64 个字节的存储空间，而每个分区的参数占据 16 个字节，故主引导扇区中总计只能存储 4 个分区的数据。也就是说，一块物理硬盘只能划分为 4 个主分区磁盘。并且 MBR 最大仅支持 2TB 的硬盘，在现在这个连 4T 都不稀奇的时代，MBR 出场的机会恐怕会越来越少。
Since only 64 bytes of storage space is reserved for the partition table in the master boot record of the hard disk, and the parameters of each partition occupy 16 bytes, the total data of 4 partitions can be stored in the master boot sector. In other words, a physical hard disk can only be divided into four primary partition disks. Moreover, MBR only supports 2TB hard disk at most. In this age when even 4T is not uncommon, the opportunities for MBR to appear will be less and less.
GPT，即Globally Unique Identifier Partition Table Format，全局唯一标识符的分区表的格式
GPT (globally unique identifier partition table format)
这种分区模式相比 MBR 有着非常多的优势。
This partition mode has many advantages over MBR.
首先，它至少可以分出 128 个分区，完全不需要扩展分区和逻辑分区来帮忙就可以分出任何想要的分区来。其次，GPT 最大支持 18EB 的硬盘，几乎就相当于没有限制。
First of all, it can be divided into at least 128 partitions, and can be separated out of any desired partition without the help of extended partitions and logical partitions. Secondly, GPT supports up to 18eb of hard disk, which is almost unlimited.