Hello,
Did you manage to solve this issue? I am currently seeing the same problem while trying to move around 9TB onto a newly installed unraid server. I am considering moving from freenas to unraid so installed unraid 6.8 onto my test HP N40L server containing 2x6TB WD reds ( 1 used for parity) and 2x3TB WD greens with no cache drive. The data has been copying for over two days but still far from done. I also see the burst of fast copy (~100MB/s) copying roughly 2GB - 2.5GB before stalling for roughly a minute. I also see the same slow read/write from the drives as shown in your video during this minute of network inactivity which makes me think that it is copying a small portion to RAM before calculating parity and writing to disk. Is this the case?
This same machine and drives did not show this behaviour in freenas which also contained the same discs in an array with one used for parity. I have enabled turbo write mode as some suggest but this did not solve this issue. Any suggestions?
Thanks for any help or advice.
