Relatively Slow Writes to Pool

[paulrbeers]

I have serveral Pools:

1 - 6 x 8TB spinning Seagates

2 - 2 x 1.92TB NVME Samssungs

3 - 3 x 3.84TB NVME Samsungs

4 - 5 x 2TB NVME (mixed)

 

All of them are in RAID 0 and I can't do better than about 600 MB/s when transferring from my Windows 10 Machine to my Unraid server on a 10gbps network.  I've installed iperf between my Unraid Server and my desktop and iperf3 tells me I am consistently getting 1 GB/s (roughly 9gbps).  I have a single SSD in my unraid server for my VM's.  If I just transfer files to that, I get 1 GB/s with Samba from the Windows 10 machine.  Why would my pools consistently only get 600 MB/s.   I get the spinners might make sense, but the NVME's?   Yes they aren't the best NVME, but when tested singularly before deploying to the server, they all pulled over 700+ MB/s and most pulled well over 1GB/s.  

 

Is there some limitation to btrfs?   I've tried RAID 0 and "Single Mode" and nothing does better than 600 MB/s.

Edited April 17, 2022 by paulrbeers

[JorgeB]

Enable disk shares and try transferring directly to that, user shares usually have some extra overhead.