U.2

U.2 (pronounced 'u-dot-2'^[1]), using the port SFF-8639, is a computer interface standard for connecting solid-state drives (SSDs) to a computer. It covers the physical connector, electrical characteristics, and communication protocols.

It was developed for the enterprise market and designed to be used with new PCI Express drives along with SAS and SATA drives. It uses up to four PCI Express lanes and two SATA lanes.

^ Burke, Steve. "U.2 vs. M.2 vs. SATA Express Interface Comparison & Speeds". Gamers Nexus. Retrieved 13 January 2022.

[1] Burke, Steve. "U.2 vs. M.2 vs. SATA Express Interface Comparison & Speeds". Gamers Nexus. Retrieved 13 January 2022.

[1]