What are the advantages of SSDs over mechanical hard disks

Perhaps the SSD (Solid State Disk) versus mechanical hard disk, the speed improvement is really fierce, the computer boot to enter the system from the minutes to the system from the minutes of time to a comprehensive change in the era of seconds readings. In fact, the benefits of SSDs go beyond speed changes, and if you think that's all you're going to get for your investment of a few hundred dollars, you're way too young!

SSD construction is relatively simple, there is no rotating platters, heads and other complex mechanical institutions, its main control unit and storage unit (FLASH chip) composed of, simply put, is an array of solid-state electronic storage chips and made of hard disk, so the shock resistance is excellent, no matter what state the computer is in, and no action will not cause damage to it (except for the fall ground). Mechanical hard disk, not to mention, the use of the computer when the slightest movement are likely to produce bad sectors.

And in terms of performance, SSDs aren't the best of the best for mechanical hard drives, and if you think it's 100% powerful in every way, you're going to be in for a laugh at some point. In fact, large capacity mechanical hard drives can reach write speeds of up to 160MB/s, with burst speeds of up to 477MB/s, almost as fast as some low-end SSDs. So why do you feel faster after replacing the SSD? It's because SSDs have a noticeable change in the randomized performance of small files.

The random read latency of an SSD is only a few milliseconds, while the random read latency of a 7200RPM drive is about 7 milliseconds, and a 5400RPM drive is as high as 9 milliseconds, which is reflected in the performance of the switching speed.

So we don't think that SSDs improve read and write speeds, but rather their performance in security, small files at any time compared to traditional mechanical hard drives has been substantially improved. Disadvantages, but also not without. As long as the hardware hangs, it's the same as the data completely 88, unlike mechanical hard drives that can still be disassembled and salvaged for a little while.

Incidentally, many manufacturers are now launching SSDs with M.2 interfaces, and M.2 SSDs are divided into two types: SATA and PCI-E, which look exactly the same, but their performance is very different. This is mainly within the M.2 has two interface definition: Socket 2 and Socket 3. Socket 2 supports SATA, PCI-E ×2 channel SSD, Socket 3 is designed for high-performance storage, support for PCI-E ×4.

The performance of the different channels naturally differ, so when you buy, be sure to check the manufacturer's introduction, ask the pre-sale staff, and understand their own device support.

When you buy an SSD, it's not just about the price difference (the PCI-E version is more expensive), it's also about the return of the SSD, which is a lot of work.