Solid state drive types

Classification method:

The storage media of solid-state drives are divided into two types. One is to use flash memory (FLASH chip) as the storage medium. The other is to use DRAM as the storage medium.

Flash-based:

Flash-based solid-state drives use FLASH chips as storage media, which is also commonly referred to as SSD. Its appearance can be made into a variety of shapes, such as laptop hard drive, micro hard drive, memory card, USB flash drive, etc. The biggest advantage of this kind of SSD solid state drive is that it can be moved, and the data protection is not controlled by the power supply. It can be adapted to various environments and is suitable for individual users.

Generally, the number of times it can be erased and written is about 3,000 times. Taking the commonly used 64G as an example, under the balanced writing mechanism of SSD, the total amount of data that can be erased is 64G X 3000 = 192000G. If you are a Video King likes to download videos every day and delete them after watching them. If he downloads 100G every day, the number of available days is 192000 / 100 = 1920, which is 1920 / 366 = 5.25 years.

If you are just an ordinary user who writes far less than 10G of data every day, just use 10G as the calculation, and you can use it for 52.5 years without interruption. And if you use a 128G SSD, you can use it for 104 years without interruption. Year! What is this concept? Like an ordinary hard disk HDD, it can theoretically read and write infinitely.

DRAM-based type:

DRAM-based solid state drives use DRAM as the storage medium and have a narrow application range. It imitates the design of a traditional hard disk, can be volume set up and managed by file system tools of most operating systems, and provides industry-standard PCI and FC interfaces for connecting to hosts or servers.

Application methods can be divided into two types: SSD hard disk and SSD hard disk array. It is a high-performance memory with a long service life. The only drawback is that it requires an independent power supply to protect data security. DRAM solid-state drives are relatively non-mainstream devices.

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