ruselok

We shall see how long it will last and if I will face the same issue again.

It is strange indeed. I re-installed unraid from the scratch, started parity sync and it shows 140+MB/s now. Really curious what could affect the performance so much.

Yes, bios setting shows it is enabled. But I am still getting exactly the same speed.

Enabled it, but nothing has changed. Still getting 34MB/s parity sync speed.

I haven't changed any settings since the first parity sync, that was giving me 100+MB/s. The question is why the parity sync speed is only 30% of what I had before.

I've got a read error on my parity drive. So I changed it and started another parity check. Surprisingly the parity check speed is around 30-34MB/s, while the initial parity check was 100+ MB/s. I've gone through different topics on this forum looking for possible solution. Have tested hard drives using DiskSpeed, nothing abnormal there. All my drives are the same, wd purple 3TB and all of them have more or less the same speed during DiskSpeed test. Tried to disable Docker. No parity check speed change. Tried to perform parity check after rebooting in safe mode. Got parity check speed a bit higher, 34-38MB/s. What can cause such a parity check speed drop? gen8-diagnostics-20221015-1244.zip