What kind of storage will cause the original information to be lost when the power is cut off?

The memory that will cause the original information to be lost when the power is cut off is RAM. Hard disk memory, floppy disk memory and ROM memory are all non-volatile memories, and the information stored in them will not be lost due to a power outage; only RAM memory will lose the original information after a power outage. The working characteristic of RAM is that after power is turned on, data information can be accessed at any location at any time, and the internal information will disappear after power is turned off.

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

The memory that will cause the loss of original information when power is turned off is RAM.

Hard disk memory, floppy disk memory and ROM memory are all non-volatile memories, and the information stored in them will not be lost due to power outage; only RAM memory will lose the original stored information after power outage.

RAM memory introduction

Random Access Memory (English: Random Access Memory, abbreviation: RAM), also called main memory, is the same as The CPU exchanges data directly with the internal memory. It can be read and written at any time (except when refreshing), is very fast, and is often used as a temporary data storage medium for the operating system or other running programs. When RAM is working, information can be written (stored) or read (retrieved) from any specified address at any time. The biggest difference between it and ROM is the volatility of data, that is, the stored data will be lost once the power is turned off. RAM is used in computers and digital systems to temporarily store programs, data, and intermediate results.

Random access memory (RAM) can both store information into and read out information from designated units. Any information stored in RAM will be lost when the power is turned off, so RAM is volatile memory.

ROM is read-only memory. In addition to fixed storage of data, tables, and firmware programs, it is also widely used in combinational logic circuits.

Features:

• Random access

  The so-called "random access" refers to when the data in the memory When it is read or written, the time it takes has nothing to do with where the information is located or where it is written. In contrast, when reading or writing information in a Sequential Access storage device, the time and location required are related. It is mainly used to store the operating system, various applications, data, etc.

  When RAM is working normally, data can be read from RAM or written to RAM. Compared with ROM, RAM has the advantages of easy reading/writing and flexible use. It is especially suitable for situations where data is frequently and quickly changed.

• Volatile

  RAM cannot retain data when the power is turned off. If data needs to be saved, they must be written to a long-term storage device (such as a hard drive).

  The working characteristic of RAM is that after power is turned on, data information can be accessed at any location at any time, and the internal information will disappear after power is turned off.

• Sensitive to static electricity

  Like other delicate integrated circuits, random access memory is very sensitive to static charges in the environment. Static electricity can interfere with the charge of the capacitors in the memory, causing data loss or even burning out the circuit. Therefore, before touching the random access memory, you should first touch the metal ground with your hand.

• Access speed

  Modern random access memory has the fastest writing and reading speeds among almost all access devices, with access delays and other mechanical operations involved. It is also insignificant compared to other storage devices.

• Requires refresh (regeneration)

  Modern random access memory relies on capacitors to store data. A fully charged capacitor represents a 1 (binary), and an uncharged capacitor represents a 0. Since capacitors have leakage to some extent, data will gradually be lost over time if no special treatment is taken. Refreshing means periodically reading the status of the capacitor and then recharging the capacitor according to its original status to make up for the lost charge. The need to refresh explains exactly the volatile nature of random access memory.

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