zerogkev

Anyone rocking an ASM1166 with all 6 ports in use able to comment on actual real world speed? After dealing with some other issues I seem to have settled on significant bottlenecks. I’ve not read every post in this topic in detail but I’ve so far only really seen discussions around theoretical limits and not many real in-use numbers. Full transparency - my current build that I’ve done most testing on has USB4 to an ASM2464PD NVME enclosure with an M.2 ASM1166 installed. I’ve tried two different brand NVME enclosures, very limited testing moving the rig to my PC with dedicated M.2 slots, and done everything I can to verify that full bandwidth is hitting the M.2 slot (running with a 990 Pro ssd saturated at nearly 38000mbps - no cable/bandwidth issues there). I’ve tried 4 different ASM1166 M.2 adapters also. All that said, when running with 6 26TB SATA drives the controller bottlenecks around 700MB/s (5500 mbps) parallel reads no matter what actions I take. This doesn’t seem consistent with Windows based benchmarks I’ve seen of M.2 ASM1166 (LevelOneTechs has a test showing it capable of hitting the nearly 2GB/s theoretical limit), but after debugging for 2 weeks now with nothing to show for it (except two corrupted disks from overheating cards as best as I can tell) - I realize I haven’t seen anyone show off Unraid using one of these at max bandwidth. Before I go crazier, can anyone verify that there aren’t any max bandwidth issues with the ASM1166 and Unraid/Linux?