What are the optical disk storage, and what kind of storage does the hard disk belong to

Hard drives are peripheral storage.

External memory refers to storage other than computer memory and CPU cache, which can generally hold data even after a power failure. Common external memory includes hard disks, floppy disks, optical discs, U disks, etc.

A hard drive is one of the most important pieces of storage in a computer. Most of the software that your computer needs to function properly is stored on your hard drive. Because the storage capacity of hard disks is larger, it is different from memory and optical discs.

A hard disk is a storage device used on a computer that uses a hard spinning platter as the base. It stores and retrieves digital data on a flat magnetic surface.

Data storage.

As the data storage of a computer system, capacity is the most important parameter of a hard disk. The capacity of a hard drive is measured in megabytes (MB) or gigabytes (GB), 1GB = 1024MB, 1TB = 1024GB. However, hard disk manufacturers usually take 1G = 1000MB when the nominal hard disk capacity, and the capacity seen in the BIOS or when formatting the hard disk will be smaller than the manufacturer's nominal value.

The capacity metric of a hard disk also includes the capacity of a single disk of the hard disk. The so-called single-disk capacity is the capacity of a single disk of the hard disk, the larger the single-disk capacity, the lower the unit cost, and the shorter the average access time.

Hard disk belongs to the data memory of the computer system, and the capacity is the most important parameter of the hard disk, and the capacity of the hard disk is measured in megabytes (MB) or gigabytes (GB).

A hard disk is a storage device used on a computer that uses a hard spinning platter as a base to store and retrieve digital data on a flat, magnetic surface. The speed is one of the important parameters to indicate the grade of the hard disk, and it is one of the key factors that determine the internal transfer rate of the hard disk, which directly affects the speed of the hard disk to a large extent.

Hard disk is one of the main storage media of a computer, consisting of one or more aluminum or glass discs. The disc is covered with a ferromagnetic material. Hard disks include solid-state drives (SSD disks, modern hard disks), mechanical hard disks (HDD traditional hard disks), and hybrid hard disks (HHD is a new hard disk born based on traditional mechanical hard disks).

The function of the hard disk is to store and read data, for example, when you run a game program, it is to read the data in the disk frequently, and the reading of data is related to the speed of the hard disk. So the hard disk functions as an internal memory in the computer to run.

1. Read-only memory (ROM).

ROM stands for Read Only Memory, and when a ROM is made, information (data or programs) is stored and stored permanently. This information can only be read, generally not written, and even if the machine is powered off, these data will not be lost. ROMs are generally used to store the basic programs and data of a computer, such as BIOS ROMs.

Its physical form factor is generally a double in-line (DIP) manifold.

2. Random access memory (RAM).

Random access memory means that data can be read or written from it. When the power of the machine is turned off, the data stored in it is lost. The memory module that we usually buy or upgrade is used as the memory of the computer, and the memory module (SIMM) is a small piece of circuit board that brings together the RAM integration blocks, which is plugged into the memory slot in the computer to reduce the space occupied by the RAM integration block.

3. Memory generally uses semiconductor memory units, including random access memory (RAM), read-only memory (ROM), and cache. Simply because RAM is the most important memory of them all.

The hard disk should be the "external memory" of the computer. Memory should be some memory inside the computer (on the motherboard) that holds intermediate data and computations of CPU calculations. This data is sometimes saved on the hard drive.

A hard disk is a primary computer storage medium consisting of one or more discs made of aluminum or glass. These discs are covered with ferromagnetic material. The vast majority of hard drives are fixed hard drives that are permanently sealed and fixed in the hard drive.

However, now removable hard drives are becoming more and more popular, and there are more and more types.

It is an external memory. The hard disk inside can be either a mechanical hard disk or an SSD. But no matter what hard drive is, it's external storage.

As opposed to removable memory, it is fixed memory.

In principle, it is electromagnetic memory; In terms of speed, it is slower than the speed of the cache and memory in the computer, but faster than the USB drive.

Most of the computer storage is Western Digital.

Secondary memory. A CD-ROM is an item that uses optical information as a storage carrier and is used to store data. Non-rewritable discs, such as CD-ROM, ***-ROM, etc.; and rewritable discs, such as CD-RW, ***-.

Optical disc is a device that uses the principle of laser to read and write, and is a rapidly developing auxiliary memory, which can store a variety of text, sound, graphics, images and animations and other digital information.

A CD-ROM is an item that uses optical information as a storage carrier and is used to store data. Divide non-rewritable discs, such as CD-ROM, ***-ROM, etc.; and erasable tapes, such as CD-RW, ***-RAM, etc. CD-ROM is a device that uses the principle of laser to read and write, and is a rapidly developing auxiliary memory, which can store a variety of text, sound, trapped fluid graphics, images and animations and other digital information.

PreparationFirst of all, you need to add the hardware:Letter engraving disc printing and burning a fierce sale of the body branch sensitive teasing equipment to get excitedOr connect the external recorder to the computer, and then install the disc burning and printing software and the driver on your computer.

File to disc engraved process stepsOpen the letter-engraved disc printing and burning client software.

2.Select File Burn.

3.Add a burn file.

4.Customize the disk information.

5.Submit a burning task.

6.The disc printing and burning all-in-one machine performs the burning task, and the automatic output is completed after burning and printing.

The storage principle of the disc is as follows: after inserting the disc into the computer host, the system will send a laser beam to irradiate the information surface of the disc, and then the disc will identify the information such as 0 and 1 according to the different reflective effects obtained and send it to the CPU for processing, and the data can be stored on the disk after the processing is completed.

CD-ROM is an item that is used as a storage carrier and used to store data, and is a device that uses the principle of laser to read and write, and hail is a rapidly developing auxiliary memory, which can store a variety of text, sound, graphics, images and animations and other digital information. According to the structure of the optical disc, the optical disc is mainly divided into several types, such as CD, ***, Blu-ray disc, etc., these types of optical discs, in the structure of the source sorghum difference, but the main structural principle is the same.

SSD is not optical disk storage, SSD generally refers to solid-state drives.

Solid state disk (solid state disk or solid state drive, abbreviated as SSD), also known as solid state drive, is a hard disk made of a solid-state electronic memory chip array.

The interface specifications and definitions, functions and usage methods of SSDs are almost the same as those of ordinary HDDs, and the shape and size are basically the same as those of ordinary inch HDDs.

Solid-state drives have the characteristics of fast read/write, light weight, low energy consumption and small size that traditional mechanical hard disks do not have, and their disadvantages are also obvious. Although IDC believes that SSDs have entered the mainstream ranks of the storage market, they are still relatively expensive, with low capacity, and it is difficult to recover data once the hardware is damaged. There are also those who believe that SSDs have a relatively short endurance (lifespan).

SSD read and write speed:

Using flash memory as the storage medium, the read speed is faster than that of HDDs. SSDs do not use a magnetic head, and the seek time is almost zero. The continuous write speed is very amazing, and most SSD manufacturers will claim that their SSDs have a continuous read and write speed of more than 500MB s, and in recent years, NVMe SSDs can reach about 2000MB s, or even more than 4000MB s.

The speed of the SSD is not only reflected in the continuous read and write, but also the fast random read and write speed is the ultimate meaning of the SSD, which is most directly reflected in most of the daily operations. Related to this is the extremely low access time, the most common 7200rpm HDD has a seek time of 12-14 milliseconds, while SSDs can easily reach milliseconds or less.

Brand model: Redmibook Pro 15 System: Windows 10

Discs belong to external memory. External memory refers to storage other than computer memory and CPU cache, which can still save data after power failure, so optical discs belong to external memory.

Common external memory is hard disk, floppy disk, U disk, etc., external memory is characterized by large capacity, low but slow access speed, so it is generally used to store programs and data that are not used temporarily. Common external memory of PCs includes floppy disk memory, hard disk memory, optical disk memory, etc. There are two types of disks: soft disks and hard disks.

There are three types of optical discs: read-only CD-ROMs, single-write CD-ROMs, WORMs, and rewritable CD-ROMs. From Feng. In terms of the working principle of Neumann's storage program and the composition of the computer, the computer is divided into combinators, controllers, memory and input and output devices, where memory refers to memory, and hard disks belong to input and output devices.

The programs** and data required for CPU operations come from memory, and the things in memory come from the hard disk, so the hard disk does not deal directly with the CPU.