U.2固态硬盘详细介绍 百科科普 中文在下面哦
U.2 SSDs, pronounced "u-dot-2" and formerly known as SFF-8639, are a computer interface standard designed for connecting solid-state drives (SSDs) to a computer. This standard encompasses the physical connector, electrical characteristics, and communication protocols. U.2 SSDs are recognized for their high performance and are specifically engineered to support the PCIe interface through a Small Form Factor (SFF) connector. This connector also supports SAS and SATA mechanical drives, making U.2 SSDs versatile in terms of compatibility with various storage interfaces.
The U.2 interface, as defined by the SSD Form Factor Work Group, is among the common SSD interface types which include SATA, mSATA, SATA Express, M.2, and PCI-E. A U.2 SSD, therefore, refers to an SSD that utilizes a U.2 port for connection. It's noteworthy that U.2 was an evolution aimed to replace older SATA-based flash storage standards. Introduced by Intel in December 2015 alongside the M.2 form factor, both U.2 and M.2 utilize the same storage device standard and are part of the PCIe-based flash storage standards aimed at superseding the older SATA-based flash storage standard.
In terms of technical specifications, the SFF-8639 connector, which is a part of the U.2 standard, can support one SATA port, two SAS ports, or up to four lanes of parallel I/O in PCIe SSDs. The drive form factor for U.2 SSDs can be either 2.5-inch or 3.5-inch, making them versatile in terms of physical compatibility with different computer and server setups. This makes U.2 SSDs particularly appealing for enterprise environments where high-speed data access and versatility in terms of compatibility with existing systems are critical.
U.2 SSD，发音为“u-dot-2”，以前称为 SFF-8639，是一种计算机接口标准，设计用于将固态硬盘 (SSD) 连接到计算机。 该标准涵盖物理连接器、电气特性和通信协议。 U.2 SSD 以其高性能而闻名，经过专门设计，可通过小型 (SFF) 连接器支持 PCIe 接口。 该连接器还支持 SAS 和 SATA 机械驱动器，使 U.2 SSD 能够兼容各种存储接口。
U.2 接口由 SSD Form Factor Work Group 定义，是常见的 SSD 接口类型之一，其中包括 SATA、mSATA、SATA Express、M.2 和 PCI-E。 因此，U.2 SSD是指利用U.2端口进行连接的SSD。 值得注意的是，U.2 是一种旨在取代旧的基于 SATA 的闪存存储标准的演进。 U.2 和 M.2 由英特尔于 2015 年 12 月与 M.2 外形尺寸一起推出，它们均采用相同的存储设备标准，并且是基于 PCIe 的闪存存储标准的一部分，旨在取代旧的基于 SATA 的闪存存储标准 。
在技术规格方面，SFF-8639连接器属于U.2标准的一部分，可支持1个SATA端口、2个SAS端口或PCIe SSD中最多4通道的并行I/O。 U.2 SSD 的驱动器外形尺寸可以是 2.5 英寸或 3.5 英寸，这使得它们在与不同计算机和服务器设置的物理兼容性方面具有多种用途。 这使得 U.2 SSD 对于高速数据访问和与现有系统兼容性方面的多功能性至关重要的企业环境特别有吸引力。
