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This article mainly introduces what is the difference between the main partition and the extended partition of the hard disk in the computer. What is introduced in this article is very detailed and has a certain reference value. Interested friends must finish reading it!

Differences: 1. The primary partition is a disk partition that can guide the computer to boot to read files, which is located in the front area of the hard disk, while the extended partition is a pointer to the next partition. 2. The main partition can be used directly, which is mainly used to check the correctness of the hard disk partition, while the extended partition can not be used directly.

The operating environment of this tutorial: windows7 system, Dell G3 computer.

Hard disk partition refers to the division of the overall storage space of the hard disk into several independent areas, which are used to install the operating system, install applications and store data files. But before partitioning, you should do some preparation and planning, including how many partitions a hard disk should be divided into, how much capacity each partition should have, and what file system each partition is going to use. For some operating systems, the hard disk must be partitioned before it can be used, otherwise it cannot be recognized. Generally speaking, starting from the convenience, ease and quickness of file storage and management, it is recommended that the hard disk be divided into multiple partitions to store different types of files, such as operating system, application programs, data files and so on.

After partitioning a hard disk, three forms of partition states are formed: primary partition, extended partition, and non-DOS partition.

Primary partition

The primary partition is a relatively simple partition, usually located in the front area of the hard disk, forming a logical C disk. The master boot program is a part of it, which is mainly used to check the correctness of the hard disk partition and determine the active partition, which is responsible for handing over the boot power to the DOS or other operating systems of the active partition. The damaged program will not be able to boot from the hard drive, but the hard drive can be read and written after booting from the floppy or optical drive.

Extended partition

The concept of extended partition is complicated, which can easily lead to confusion between hard disk partition and logical disk. The fourth byte of the partition table is the partition type value, the normal bootable basic DOS partition value greater than 32MB is 06, and the extended DOS partition value is 05. If you change the basic DOS partition type to 05, the system cannot be started, and the data in it cannot be read or written. If you change 06 to a type that DOS does not recognize, such as EFH, then DOS considers that the partition is not a DOS partition and of course cannot be read or written. Many people use this type of value to implement the encryption technology of a single partition, and the partition can be restored to normal by restoring the original correct type value. But the extended partition can not be used directly, it is used in the way of logical partition, so the extended partition can be divided into several logical partitions. The relationship is that the former contains the latter, and all logical partitions are part of the extended partition.

The difference between primary partition and extended partition of hard disk

1. Different references

Primary partition: also known as the primary disk partition, located in the front area of the hard disk, forming a logical C disk.

Extended partition: a pointer to the next partition, which forms an one-way linked list.

2. Different characteristics

Primary partition: no other types of partitions can be divided in the partition, so each primary partition is equivalent to a logical disk (at this point, the primary partition is very similar to the logical partition, but the primary partition is divided directly on the hard disk. Logical partitions must be built on extended partitions).

Extended partition: through the data of this extended partition, you can find the starting position of the next partition (in fact, the next logical disk), and all partitions can be found by analogy.

3. Different functions

Primary partition: the master boot program is a part, this program is mainly used to check the correctness of the hard disk partition, and to determine the active partition, responsible for handing over the boot power to the DOS or other operating systems of the active partition. The damaged program will not be able to boot from the hard drive, but the hard drive can be read and written after booting from the floppy or optical drive.

Extended partition: extended partition can not be used directly, it is used in the way of logical partition, so extended partition can be divided into several logical partitions. Relationships are included relationships, and all logical partitions are part of an extended partition.

The above is all the contents of the article "what is the difference between the main partition and the extended partition of the hard disk in the computer". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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