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When we buy a computer, we pay attention to some of its peripherals and hardware configuration, among which hard drive is one we need to focus on. Hard drives are usually distinguished between solid state and mechanical, solid state and liquid, so what is difference between them? In this article, we will share some information about hard drives.

The Solid State Hard Disk Drive, referred to as Solid State Disk for short, is a hard disk drive that consists of an array of solid-state electronic memory chips, two components of which are a control unit and a storage unit. Its use method, specification and interface definition are exactly same as ordinary hard drives, and its shape and size are also same as ordinary hard drives, and it is widely used in military, vehicle, video surveillance, industrial control, network monitoring , medical, aviation navigation equipment, etc. You can often see solid state drives.

The operating temperature range of solid state hard drives is relatively wide, with standard commercial products ranging from 0 to 70 degrees and industrial products ranging from -40 to 85 degrees. Current hard drives are of a type of disk and data is stored in disk sectors. A solid state hard drive made from a flash drive looks different from a traditional hard drive. At present, manufacturers such as Samsung have released many types of SSDs, so SSDs are general direction of hard drive development.

Solid-state drives have a number of advantages:

Firstly, data access speed is very high. For two computers with same configuration, it takes just 18 seconds for a laptop with a solid state hard drive, and 31 seconds for a laptop with a traditional hard drive, which is almost half lag.

Secondly, it also has a shock and drop protection function. Due to use of flash memory chips, there are no mechanical parts inside, and it will not affect normal use even if it is moved at a high speed or even when it is flipped and tilted, so that chance of data loss is reduced. to a minimum when laptop collides with a hard object or is dropped.

Third, SSDs generate less heat and dissipate heat faster. However, due to high cost of SSDs, it will take time for them to be fully popularized. Except for high-end use, ordinary computer users will not use SSDs.

Unlike SSDs, although they are all hard drives, liquid hard drives use different media in terms of storage. A fluid dynamic hard drive is a hard drive that uses a fluid dynamic bearing motor, also known as a fluid dynamic bearing hard drive. Many people think that a liquid hard drive is, like its name, a hard drive with a liquid storage medium, but in fact it is not, it is a hard drive with a single-finger bearing that uses an oil film instead of balls. It has been used in precision engineering industry. Its core technology uses mucosal oil bearings, replacing balls with oil films. In 1996, Seagate released first Mazda FDB and then phased out first hard drive using a fluid dynamic bearing motor. Compared with traditional ball bearing hard disk, advantages of fluid dynamic bearing hard disk are obvious. First, it reduces noise and temperature, which avoids direct friction between ball and metal surface of bearing and minimizes noise and heat generation of hard drive. Second, shock absorption and noise reduction. The oil film can effectively absorb vibration and improve shock resistance of hard disk. Third, reduce wear and tear, improve reliability of hard disk and extend the service life.

A liquid hard drive is actually a mechanical hard drive. Its speed is low, but it has a large capacity and is relatively cheap in price. It is suitable for storing and installing programs. The storage speed of solid state hard drives is fast, but capacity is relatively small, and price is relatively high. Generally, system and frequently used software are installed.

The above is difference between a solid state hard drive and a liquid hard drive. If you only use it at home and don't need too complicated a configuration, you can choose a cheaper mechanical hard drive that has a liquid hard drive. But when it comes to a relatively high-end environment such as medical, aerospace, etc., use of SSDs is undoubtedly best choice.