What is the abbreviation of mechanical hard drive?

The full English name of mechanical hard disk is "Hard Disk Drive", or "HDD" for short. The reason why a mechanical hard drive is called a mechanical hard drive is because it is completely made of mechanical structure inside. A mechanical hard drive is mainly composed of platters, heads, platter shafts, control motors, head controllers and other mechanical devices. The advantages of mechanical hard drives are large capacity, affordable prices, and relatively easy data repair, while the disadvantage is that the transfer rate is relatively It is lower, has poor shock resistance, has relatively high power, and is relatively large in weight and volume.

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

Introduction to mechanical hard disk

The full English name of mechanical hard disk is "Hard Disk Drive", or "HDD" for short.

The reason why a mechanical hard drive is called a mechanical hard drive is because it is completely made of mechanical structure inside. A mechanical hard drive consists of a disk surface, a motor and a magnetic head. Usually these structures are sealed in an iron box to prevent its internal structure from contacting the outside world.

Mechanical hard disk is mainly composed of: platter, magnetic head, platter shaft and control motor, magnetic head controller, data converter, interface, cache and other parts.

Mechanical hard drives are located in a dust-free factory during the entire production process. Any tiny particle of dust falling on the disk surface will cause damage to the entire disk under its working status of thousands of revolutions per minute. They are all devastating blows. Common mechanical hard drives have 5400 rpm and 7200 rpm, so friends, please do not dismantle the mechanical hard drive by yourself.

There are many small grids on the disk surface. When the mechanical hard disk is working, the magnetic head will float on the disk surface to read the data in the small grids on the disk. Rather than saying that the magnetic head is reading data, it is better to say that the magnetic head is reading the magnetism of the small grid. Each small grid is composed of small magnetic particles. The magnetic particles can show different magnetisms. The two different directions of magnetism correspond to 0 and 1 in computer binary, so that the magnetic head can read data. When writing data, the write head can change the polarity direction of the small magnetic particles in the small grid, thus writing the data to the disk.

The symptoms of a broken mechanical hard drive are as follows:

1. The hard drive makes a "click-click" sound. This is the most intuitive feeling after the magnetic head is damaged. Normal hard disk will also make a faint sound when it is working, but it needs to be distinguished in an extremely quiet environment. This is a normal phenomenon and users do not need to worry. However, the sound produced when a hard disk head is damaged can be heard even in a noisy environment.

2. The hard disk does not spin when turned on or spins for a few seconds and then stops spinning. The failure of the hard drive to spin up is usually caused by motor or circuit board failure; the hard drive automatically stops spinning due to damage to the magnetic head, which is common in Seagate and Samsung hard drives.

3. The system blue screen prompts relevant error codes. All three types of codes indicate physical damage to the hard drive, such as bad sectors, damaged firmware, or damaged heads.

4. BIOS cannot recognize the hard disk. There are many reasons why the hard drive cannot be recognized. Common faults include bad sectors, firmware damage, head motor failure, circuit board burnt, etc.

The difference between mechanical hard drive and solid state drive

Hard drive can be divided into mechanical hard drive (HDD) and solid state drive (SSD), take a look below Comparison of the advantages and disadvantages of mechanical hard drives and solid-state hard drives

1. Shock and drop resistance: Mechanical hard drives are all disk-type, and data is stored in disk sectors. The solid-state drive is made of flash memory particles (i.e., memory, MP3, U disk and other storage media), so there are no mechanical parts inside the SSD solid-state drive, so it will not be affected even when moving at high speed or even with flipping and tilting. to normal use, and can minimize the possibility of data loss in the event of collisions and shocks. Compared with mechanical hard drives, solid hard drives have an absolute advantage.

2. Data storage speed: The speed of mechanical hard disk is about 120MB/S, the speed of SATA protocol SSD is about 500MB/S, and the speed of NVMe protocol (PCIe 3.0×2) SSD is about 1800MB/S. S, the SSD speed of NVMe protocol (PCIe 3.0×4) is about 3500MB/S.

3. Power consumption: The power consumption of solid-state drives is also lower than that of mechanical hard drives.

4. Weight: Solid-state drives are lighter in weight, 20-30 grams lighter than conventional 1.8-inch hard drives.

5. Noise: The mechanical hard disk needs to rotate the disk at high speed when working. The high-speed rotation of the motor inevitably brings noise and heat. Since solid-state drives have no mechanical parts or flash memory chips, they have the characteristics of low heat generation and fast heat dissipation. They also have no mechanical motors and fans, and the noise level is 0 decibels.

6. Maintenance and optimization methods and performance: The structure of mechanical hard disk determines that there are not many ways to optimize it, while solid-state hard disk can be optimized in many more aspects.

Summary:

The advantages of mechanical hard drives over solid-state drives are large capacity, affordable price, and relatively easy data repair, but there are also many shortcomings, such as transfer rate. Relatively low, poor shock resistance, relatively large power, relatively large weight and volume, etc.

Compared with mechanical hard drives, solid-state drives have advantages such as fast speed, small size, and easy installation. The disadvantages are that the price is high, the heat is relatively large, and it is more troublesome to repair data after it is damaged.

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