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What is the difference between m2 SSD and sata SSD?

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Author : PURPLELEC
Update time : 2023-10-31 10:43:54
  Industrial-grade SSD are the same as ordinary hard drives in terms of interface specifications and definitions, functions and usage methods, and the product appearance and size are also consistent with ordinary hard drives. It is widely used in military, vehicle, industrial control, video surveillance, network monitoring, network terminals, electric power, medical, aviation, navigation equipment and other fields.
  Industrial-grade SSD have two interfaces, namely SATA interface and M.2 interface. The main difference between the SATA interface and the m.2 interface is the difference in transmission speed and volume:
  1. The transmission speed is different:
  The transmission speed of M.2 is faster. The 960PRO M.2 industrial-grade solid-state drive using the NVMe protocol can read at a maximum speed of 3.5GB/s, which is 7 times that of traditional SATA SSD.
  The maximum transmission speed of the SATA 3.0 channel is 6Gbps, and the actual maximum speed is 560MB/s.
  2. The volumes are different:
  The total thickness of the M.2 standard SSD in single-sided arrangement is only 2.75mm, and the thickness in double-sided arrangement is only 3.85mm.
  The size of mSATA is 51mm×30mm, and its single-sided layout thickness is 4.85mm.
  However, it should also be noted that not all M.2 industrial-grade SSD have fast read and write speeds. If it is an M.2 interface industrial-grade solid-state drive using a SATA channel, the read-write speed will not exceed 550MB/s.
SATA SSD
  Advantages of SATA interface:
  1. SATA transmits data in a continuous serial manner, and can use a higher operating frequency with a smaller bit width to increase the bandwidth of data transmission.
  2. SATA only transmits 1 bit of data at a time, and the transmission efficiency is relatively high.
  3. SATA has a higher starting point and greater development potential.
  Advantages of M.2 interface:
  1. The speed of data transmission is faster. There are two types of M.2 interfaces, namely Socket 2 (B key——ngff) and Socket 3 (M key——nvme). Socket2 supports SATA and PCI-E X2 interfaces. , and if the PCI-E ×2 interface standard is adopted, the maximum reading speed can reach 700MB/s, and the writing speed can also reach 550MB/s;
  The Socket 3 interface can support PCI-E ×4 interface, with a theoretical bandwidth of up to 4GB/s.
  2. Industrial-grade SSD using the M.2 interface provide greater storage capacity.