Is the hard disk external storage or internal memory?

The hard disk is external storage. The full name of external memory is "external memory", which refers to storage other than computer memory and CPU cache. Generally, data can still be saved after power failure; external memory is usually magnetic media or optical disks, such as hard disks, floppy disks, tapes, CDs, etc., which can It stores information for a long time and does not rely on electricity to store information. However, it is driven by mechanical components and is much slower than a CPU.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

The hard disk is external storage (external storage).

External storage refers to storage other than computer memory and CPU cache. This type of storage can generally still save data after a power outage. Common external memories include hard disks, floppy disks, optical disks, U disks, etc.

External memory is used to store programs and data that are not used temporarily. Information is frequently exchanged between internal memory and external memory. External storage is usually magnetic media or optical disks, such as hard disks, floppy disks, tapes, CDs, etc., which can store information for a long time and does not rely on electricity to store information. However, it is driven by mechanical parts and is much slower than the CPU.

• Floppy disks: Floppy disks use a soft polyester material to make prototype negatives, coated with magnetic material on both surfaces. Commonly used floppy disks have a diameter of 3.5 inches and a storage capacity of 1.44MB. Floppy disks read data through a floppy disk drive.

• U disk: U disk is also called "flash disk" and can store data through the USB port of the computer. Compared with floppy disks, U disks have replaced floppy disks due to their small size, large storage capacity, and ease of portability.

• Hard drive: consists of one or more aluminum or glass discs. These discs are covered with ferromagnetic material. The hard disk is the main storage device of the computer.

  Hard disks are made of aluminum alloy original disks coated with magnetic material. Each hard disk is composed of several magnetic discs. Among them, solid-state drives are semiconductor memories that use flash memory as the storage medium. Compared with mechanical hard drives, they have advantages such as fast read and write speeds, low latency, and good shock resistance. Their share of shipments in the global hard drive market continues to increase. The popularity of mobile solid-state drives has greatly reduced the weight of backpacks for people who are accustomed to mobile mechanical hard drives. Moreover, the combination of solid-state and mobile hard drives is obviously in line with the main characteristics of mobile storage products, such as being collision-resistant, lightweight, and plug-and-play without waiting.

• Tape memory: Tape is also called sequential access memory SAM. It has a large storage capacity, but the search speed is very slow, and is generally only used as a data back-up store. There are three types of tape drives used in computer systems: reel tape drives, data streaming tape drives, and spiral scan tape drives.

• Optical disc storage: Optical disc refers to a disc that uses optical means to store information. It applies optical storage technology, which uses lasers to write information on a certain medium, and then uses lasers to read out the information. Optical disk storage can be divided into: CD-ROM, CD-R, CD-RW, and DVD-ROM, etc.

Extended knowledge:

Most of the software a computer needs to function properly is stored on the hard drive superior. Because the storage capacity of hard disk is larger, it is different from memory and optical disk. A hard drive is a hard disk-based storage device used in computers. It stores and retrieves digital data on a flat magnetic surface.

Hard drives are very afraid of dust. If dust is sucked into the circuit board, it will cause the hard drive to work unstablely or cause damage to internal parts. The functional working status of the hard disk has a great relationship with the lifespan and temperature. Too high or too low temperature will cause the clock frequency of the crystal oscillator to change, which will cause circuit component failure. If the temperature is too low, it will cause air leakage. Medium moisture condenses on components, causing short circuits.

Secondly, clean up the hard drive regularly. This will increase hard drive speed. If there are too many junk files on your hard drive, it will slow down and possibly damage the tracks. However, do not clean it every three days, as this will also shorten the life of the hard drive.

Finally, it’s anti-virus. Viruses are one of the biggest threats to the files stored on the hard drive. Therefore, when we find viruses, we should take timely measures to remove them and try not to format the hard drive.

For more related knowledge, please visit the FAQ column!

The above is the detailed content of Is the hard disk external storage or internal memory?. For more information, please follow other related articles on the PHP Chinese website!