Hello all,

So I've been dumping a lot of my files onto my new Unraid server. I have all drives utilizing ZFS format. I have "reconstruct write" turned on. Parity drive is currently cancelled until everything is in place. My transfer speeds are very slow. Avg is like 60MB to 80MB. It will jump up to like 130MB but then plummet to like 9 or 10MB. I don't know. I tried to ensure nothing would get in the way. The drives I have are both 5400RPM and 7200RPM. I'm running the file transfer using the built in Unraid Dynamix File Manager. To be completely honest, I would've been better off just using a separate Windows computer and logged into each share and just move files between shares as it probably would've pushed them faster. But really I'm not sure. Maybe someone could help me with this because these drives should be pushing like 250MB a second. Attached in a zip file of my logs (diagnostics). Perhaps someone can assist and take a look and let me know where to find the yellow brick road?

Thanks,

ei8htb8ll

treasurechest-diagnostics-20250715-1541.zip

Performance of ZFS formatted drives in the main array is known to be slow (performance in pools is fine).

Also note that array to array transfers are always slow due to parity, but like mentioned, with zfs it will be worse.

Hi Itimpi and JorgeB!

Ok, I then I guess I'll chalk it up to ZFS format. But there's no parity at the moment. That would still cause slow file transfer? Which drive format would allow for the fastest file transfer and and also be just as reliable as ZFS? I chose ZFS because I've heard it's the most secure and reliable drive format. But I could be wrong?

Thanks,

10 hours ago, ei8htb8ll said:

That would still cause slow file transfer?

With ZFS on the array yes, the issue happens both with parity and without it.