Solid-state drives and mechanical hard drives

Solid-State drive has been on the shop for a long time, but the mainstream is still buying traditional mechanical hard disk, and for solid-state drives most appear in the high-end configuration installed, because the current SSD capacity is small, high prices, leading to the current mainstream users to choose less, but with the development of technology, Solid-state drives are becoming mainstream and trending. Let's introduce the benefits of SSDs and the difference between SSDs and HDDs.

The difference between a solid state drive and a normal hard drive

1. The solid-state drive starts fast and does not accelerate the rotation of the motor.

2. Solid-state drive without head, fast random read, low read latency. According to the test: two computers under the same computer, the laptop with a solid-state drive from the boot to the desktop for a total of 18 seconds, and the traditional hard drive with a notebook for 31 seconds, nearly half of the gap between the two.

3. Relatively fixed read time. Because the addressing time is independent of where the data is stored, disk fragmentation does not affect read time.

4. DRAM-based solid-state drives write extremely fast.

5. Solid-State drive is noise-free. Because it does not have a mechanical motor and a fan like a normal hard drive, the noise value at work is 0 decibels. Some high-end or large-capacity products are equipped with fans, which can still produce noise.

6. Low-capacity flash-based SSDs are operating with low energy consumption and heat, but high-end or high-capacity products consume more energy.

7. There is no mechanical moving parts inside the SSD, no mechanical failure, no collision, shock, vibration. This will not affect normal use even at high speeds, even with rollover tilt, and minimizes the possibility of data loss when a laptop is accidentally dropped or collided with a hard object.

8. Solid-state drives operate over a wide range of temperatures. A typical hard drive can only operate in the range of 5-55 degrees Celsius. While most SSDs can work in-10~70摄氏度, some industrial-grade SSDs can also operate in-40~85摄氏度, or even over a larger temperature range.

9. Low-capacity SSDs are smaller and lighter than the same-capacity hard drives. However, this advantage gradually decreases with the increase of capacity. Up to 256GB, SSDs are still lighter than ordinary hard drives of the same capacity.

The disadvantage of SSD vs. HDD comparison:

1, the cost is high, the maximum capacity is low;

2, because not like the traditional hard disk as tired as the Faraday cage, solid-state drives are more likely to receive some external factors adverse effects. such as power outages (especially for DRAM-based SSDs), magnetic interference, electrostatic, etc.

3, the Write Life is limited (based on Flash). The average flash write life is 10,000 to 100,000 times, the special can be large 1 million to 5 million times, however, the entire computer life period of some parts of the file system will still write more than this limit;

4, data corruption after difficult to recover. Once the hardware is damaged, if it is a traditional disk or tape storage method, data recovery may also save some of the data. But if the solid-state storage, one but the chip is damaged, to be broken into a few or the current breakdown of the chip to retrieve data that is almost impossible;

5, high energy consumption, DRAM-based solid-state drives at any time the power consumption is higher than the traditional hard disk, especially when the power is off, or data loss.

Solid-state drives and mechanical hard drives