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How to choose solid state hard drive and mechanical hard drive?
More and more computer users want to read and write faster and work faster, and they will be interested to know what solid state and mechanical hard drives are. So how do you choose a solid state hard drive or a mechanical hard drive?
1. Mechanical hard disk (HDD) is a traditional conventional hard disk, mainly composed of: disk, magnetic head, disk shaft and control motor, head controller, data converter, interface, cache and other parts. All platters in a mechanical hard disk are mounted on a rotating shaft, and each platter is parallel to each other. There is a magnetic head on storage surface of each platter, and distance between magnetic head and platter is less than a hair's length, diameter is still small, all magnetic heads are connected to magnetic controller heads, and magnetic head controller is responsible for movement of each magnetic head.
2. Solid state drives (Solid State Drives) are hard drives that consist of arrays of solid-state electronic memory chips. In 1970, StorageTek developed first solid state hard drive, in 2007 Toshiba launched first portable computer with a 120GB solid state hard drive, and today development of solid state hard drives is proceeding at a fast pace. There are two types of media for SSDs, one uses FLASH chips as media, and other uses DRAM as media. At present, FLASH memory chips are widely used as a storage medium.
Comparison of read and write speeds:
The HDD read speed limit cannot exceed 200MB per second, and write speed is also difficult to exceed 100MB per second; The SSD hard drive has a big advantage in transfer speed, up to 500MB/s. It can reach 400 MB/s. -600M per second, and recording speed can also reach 200M per second. It only takes a few seconds for a 1G file, so users who need to read or process large files in pursuit of speed are better off choosing an SSD.
Data security comparison:
Traditional hard disk completes reading and writing data by reading disk with a magnetic head, especially during high-speed rotation process, collision between disk and magnetic head is likely to result in data corruption, while SSD hard disk has no disk, unless its chip is deformed. When deformed by external extrusion, data can be safely stored, so difference between mechanical hard disk and solid state hard disk is very large in terms of data security.
SSD hard drives have a big speed advantage, but due to higher cost, current price of SSD hard drives is usually 2-3 times higher than HDD hard drives. However, with continuous development of Moore's law, density of NAND flash memory chips in solid state drives. The larger size, higher storage capacity and lower price in future. It can be foreseen that SSD hard drives will replace traditional HDD hard drives. At same time, SSDs have advantages in size and quality, and have better shock resistance, which is more convenient for users who often travel with computers.
Comparison of power consumption and noise:
The high-speed rotation of hard disk requires a powerful stepper motor, while SSD hard disk does not need a motor, so power consumption of hard disk is much higher. there will be slight vibrations and noises to rotation of motor during operation, but SSD hard drives do not have such problems.
Traditional HDDs have large capacities, largest of which is 4TB, but nowadays, main capacity of SSDs is 120GB or 240GB. While there are 1TB SSDs available, their price is unacceptable for mainstream users.
If you are a large capacity user, HDD has obvious advantages in terms of capacity, so choosing HDD is undoubtedly best choice.
If you're looking for speed for gaming and office work, have specific storage speed requirements, or if you're a frequent traveler, choose an SSD.
If you are a regular computer user who is looking for economy, select the HDD.