@vaxman said in Slow read speed when mining?:
I wouldn't say there is a "bottleneck", as a 70s scan time is reasonable for Burst's 4 minute block time. I guess you have a 55W/Socket-F Opteron-2423HE system from ~8 years ago. You can not expect the same throughput per GHz when comparing across 4 (!) generations.
There might be enough resources left for another 4 drives (adding up to 12*8TB=96 TB) and you're still at or around 70 seconds. Expansion either by USB3-Hub or "real" 4-Port USB3-Controller (i.e. Sonnet Allegro Pro, Startech PEXUSB3S44V).
Anyway, you want to reduce scan time (for what reason ? Look at the block time distribution and start to calculate..).
With your existing setup, you may utilize more cores by having two threads per disk. Assuming you have two 4 TB plotfiles per disk, put them in different directories and configure your miner accordingly:
The disks should easily deliver 50 MB/s each for two data streams.
This should bring your scan time down by a third to ~50s.
OpenCL (GPU) assisted mining is a no brainer when you have only 2 PCI-express slots. There's not enough info on your config so we need to keep guessing - are all onboard SATAs in use ?
Switching from Socket-F to a modern CPU (AVX2/AVX512) will
- about quadruple your throughput per GHz
- consume less energy, if that is a concern,
- if chosen carefully, be a lot more scalable
but that all depends on your choice of target-volume, -scan-time, budget for investment and operating costs.
What do you mean by "real" usb 3.0 controller? The LogiLink I have is not good or what? Also I cant put any more on this motherboard as it only has 2 pcie slots so 8 drives max I guess?
I also cannot use GPU miner as I dont even have a GPU in the system and not planing to get 1 as Im already out of pcie slots.