What does the m2sata interface of SSD mean?

M2 is the interface, which you can understand as the shape, not the essence. M2 is divided into several types, namely M bond and B bond. In short, m2 is divided into pcie x4 controller and sata3 controller. If it is a sata3 controller, then the solid state of m2 and sata3 has the same performance. For example, Samsung's 850evo has 2.5 sata3 and m2, and its performance is the same.

I. SATA3 hard disk interface:

Basically, all motherboards now have this hard disk interface, because this interface is the longest used interface in the original mechanical hard disk, sata3 interface.

Basically, every motherboard will have a SATA3 interface, and this hard disk is generally like this:

The picture above shows a solid state drive with SATA3 interface.

The theoretical limit of physical reading of this hard disk speed-dependent interface is generally 600MB/S, but the reading speed is usually 480MB/S~580MB/S, so this interface still has limitations on solid-state advantages, so the solid-state hard disk with M.2 interface appears.

Two. M.2 interface:

M.2 is a new interface of SSD and a new interface specification introduced by Intel, which is used to replace MSATA, that is, NGFF, which we often mentioned before. The English name is Next Generation Form Factor.

The main advantage of M.2 interface SSD is that it is smaller and faster than traditional SATA3.0 and MSATA, so it is more compatible with some mobile devices.

The appearance of M.2 interface laid the foundation for the speed advantage of solid state disk:

Solid-state hard disk (SSD) is a hard disk composed of an array of solid-state electronic storage chips, which is composed of a control unit and a storage unit (FLASH chip and DRAM chip).

Solid-state hard disk is exactly the same as traditional hard disk in interface specification and definition, function and usage, as well as product appearance and size, but I/O performance is greatly improved compared with traditional hard disk. Widely used in military, vehicle, industrial control, video monitoring, network monitoring, network terminals, electric power, medical care, aviation, navigation equipment and other fields.

The working temperature range of the chip is very wide, including commercial products (0~70℃) and industrial products (-40~85℃). Although the cost is high, it is gradually spreading to DIY market. Because solid-state hard disk technology is different from traditional hard disk technology, there are many emerging memory manufacturers. Manufacturers only need to buy NAND memory and cooperate with appropriate control chips to manufacture solid-state hard disks. SATA-3 interface, M.2 interface, MSATA interface, PCI-E interface, SAS interface, CFast interface and SFF-8639 interface are widely used in the new generation of solid state drives.

But when SSD is powered off for a long time and placed in a high temperature environment, it will face the risk of data loss. So it is not a good choice to back up data with SSD.

With the rapid development of Internet, people's demand for data and information storage is increasing. Now many storage manufacturers have launched their own portable solid state drives, and more mobile solid state drives supporting Type-C interface and solid state drives supporting fingerprint identification have been launched.