硬件相关 HBA IT mode SAS卡 直通卡 功能对比 LSI 直通卡的特功能对比 LSI SAS1068E 1 2 3 4 5 6 PCIe 1.0 x8 lanes = 2GB/s or x4 lanes = 1GB/s SFF-8087 port = 4x SAS lanes SFF-8484 port = 4x SAS lanes SAS1/SATA2 = 3Gbps = 375MB/s 8x SAS lanes * 375MB/s = 3GB/s (24Gbps) 不支持SATA硬盘大于2TB的SATA硬盘(SAS盘无限制),已经淘汰无购买价值 LSI SAS2008(8x SAS lanes) LSI SAS2004(4x SAS lanes) LSI SAS2116(16x SAS lanes) 1 2 3 4 5 6 7 PCIe 2.0 x8 lanes = 4GB/s or x4 lanes = 2GB/s SFF-8087 internal port = 4x SAS lanes SFF-8088 external port = 4x SAS lanes SFF-8644 external port = 4x SAS lanes SAS2/SATA3 = 6Gbps = 750MB/s 8x SAS lanes * 750MB/s = 6GB/s(48Gbps) 最适合接普通机械硬盘的直通卡, 带宽足够机械盘,同时发热低 LSI SAS2308(8x SAS lanes) 1 2 3 4 5 6 7 PCIe 3.0 x8 lanes = 7.8GB/s SFF-8087 internal port = 4x SAS lanes SFF-8088 external port = 4x SAS lanes SFF-8644 external port = 4x SAS lanes SAS2/SATA3 = 6Gbps = 750MB/s 8x SAS lanes * 750MB/s = 6GB/s(48Gbps) 发热较高,可以接SATA接口的固态盘,或者接大量机械硬盘带宽不够时可用 LSI SAS3008(8x SAS lanes) 1 2 3 4 5 6 PCIe 3.0 x8 lanes = 7.8GB/s SFF-8643 internal port = 4x SAS lanes SFF-8644 external port = 4x SAS lanes SAS3 = 12Gbps = 1.5GB/s 8x SAS lanes * 1.5GB/s = 12GB/s(96Gbps) 支持12Gbps的SAS3盘 LSI SAS3408(8x SAS lanes) 1 2 3 4 5 6 7 PCIe 3.0 x8 lanes = 7.8GB/s SFF-8643 internal port = 4x SAS lanes SFF-8644 external port = 4x SAS lanes SAS3 = 12Gbps = 1.5GB/s NVME support via "Tri-Mode" 8x SAS lanes * 1.5GB/s = 12GB/s(96Gbps) 支持nvme固态