Mellanox 10GbE SFP PCIe card solution
Mellanox 10GbE SFP PCIe card solution
You're exploring options for a 10 Gb Ethernet upgrade between your NAS and PC, aiming for cost savings by using used parts. The challenge is finding SFP modules that work with RJ45 NICs, especially since you're new to SFP technology. Regarding the Mellanox MCX311A-XC311A, it's important to note that SFP module compatibility can be tricky—most SFP modules are designed for specific manufacturers. While some cross-compatibility exists, it often requires careful testing or may need firmware tweaks. For RJ45 switches, they're straightforward and widely supported. TrueNAS should work with standard RJ45 NICs, but you might need to configure drivers or firmware if the device is older or less common. Consider reaching out to TrueNAS support or checking their compatibility list for more details.
ConnectX3 functions well with TrueNAS. It operates smoothly on Windows 10, though I suspect drivers for Windows 11 might pose issues. The most cost-effective solution is purchasing two Intel X520-DA2 cards. These will integrate seamlessly with TrueNAS, unlike the previous model which required a fiber transceiver and a 10Gb link. You can find them on eBay at the provided link. Ensure you configure the subnet settings in both TrueNAS and the Windows NIC, share SMB resources appropriately, and clear old shares before migrating to the new network setup. This approach guarantees traffic stays on the dedicated link rather than your regular Ethernet.
When your NAS and PC are near each other, using a DAC (Direct Attached Copper) cable might be more economical. (10GBASE-T copper SFPs remain costly for some unclear reason.) If you opt for fiber, ensure the single-mode and multimode cables are compatible. The SFPs and fiber you select must adhere to identical standards. Consider Intel NICs with built-in 10GBASE-T ports—they may be slightly pricier than older Mellanox solutions but will be more affordable than both 10GBASE-T SFPs and standard fiber cables.