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What is an Solid State Disk? What is the difference between Solid State Disks?
2018-07-27
Solid State Disk (Solid State Disk), also known as electronic hard disk or solid state electronic disk, is a hard disk composed of a control unit and a solid state storage unit (DRAM or FLASH chip).
 
The interface specification and definition, function and usage of the SSD are the same as those of the ordinary hard disk, and the shape and size of the product are also consistent with the ordinary hard disk. Since the solid state drive does not have the rotating medium of an ordinary hard disk, the shock resistance is excellent. Its chip has a wide operating temperature range (-40~85°C). Currently widely used in military, automotive, industrial control, video surveillance, network monitoring, network terminals, power, medical, aviation, navigation equipment and other fields. At present, due to the high cost, it is gradually spreading to the DIY market.
 
The advantages of solid state drives:
 
1. Start fast, no motor accelerates the rotation process.
 
2. No need for heads, fast random read, and minimal read latency. According to the relevant tests: two computers under the same configuration of the computer, the notebook with SSD from the boot to the desktop took only 18 seconds, while the notebook with the traditional hard drive took a total of 31 seconds, almost half of the two gap.
 
3. Relatively fixed read time. Since the addressing time is independent of the data storage location, disk fragmentation does not affect the read time.
 
4. DRAM-based SSDs write extremely fast.
 
5. No noise. Since there is no mechanical motor and fan, the noise value is 0 dB when working. Some high-end or high-capacity products are equipped with fans, so noise is still generated.
 
6. Low-capacity flash-based solid-state drives consume less energy and generate less heat while operating, but high-end or high-capacity products consume more energy.
 
7. There are no mechanical moving parts inside, no mechanical failure, and no collision, shock or vibration. This will not affect normal use even at high speeds and even with tilting and tilting, and it will minimize the possibility of data loss when the notebook accidentally falls or collides with a hard object.
 
8. The operating temperature range is larger. A typical hard drive can only operate from 5 to 55 °C. Most SSDs can operate at -10~70°C, and some industrial-grade SSDs can operate at -40~85°C or even larger temperature ranges (eg: RunCore military-grade product temperature is -55~135 °C).
 
9. Low-capacity SSDs are smaller and lighter than comparable capacity drives. But this advantage gradually diminishes as capacity increases. Up to 256GB, SSDs are still lighter than regular hard drives of the same capacity.
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