What is the difference between u2 and m2 drives?

U.2 and M.2 drives are both high-speed storage options, but they differ in terms of their physical form factor, interface, and compatibility.

U.2 drives are larger and use the same interface as SATA and SAS drives, which makes them compatible with many existing systems. They are connected to the motherboard using a U.2 connector, which requires a separate power connector. U.2 drives typically offer higher capacities than M.2 drives and can provide faster speeds than SATA-based SSDs.

M.2 drives are smaller and use a different interface, which can be either SATA or PCIe. They are connected to the motherboard using an M.2 slot, which can support different key configurations depending on the interface used. M.2 drives are usually less expensive than U.2 drives and are more suitable for use in compact devices such as laptops and tablets.

In summary, U.2 drives are larger and use the same interface as SATA/SAS drives, making them compatible with many existing systems. M.2 drives are smaller and use a different interface, which can be either SATA or PCIe, and are more suitable for use in compact devices.