December 4, 20232 yr Hello, I have built an Unraid server with a Gigabyte Z270M MB, i7 7700K and 16GB RAM. As I had a QNAP NAS before, I have backup my data on various internal HDDs. Now, I have created an internal array with 4 Seagate Ironwolf PRO 8TB HDDs (3+1parity) and a 2TB ADATA Legend 800 NVME as cache. I have connected 2 of my backup drives (Seagate Ironwolf PRO 4TB, NTFS formatted) and mounted them with Unassigned Devices and began transferring the data to the array. My issue is that the transfer rate started at around 150-160MB/s but after a couple of minutes it went down to 75-80MB/s and is capped there. I see that it only writes on the parity and the first disk of the array which I assume is correct (I'm an Uraid noob, so...). I also tried to change the primary storage from Array to Cache, it makes no difference. I was expecting a much higher performance, 150-160MB/s sustained transfer rate should've been OK. I'm attaching a couple of screenshots, maybe it helps.
December 4, 20232 yr Author Thanks for the hint, I have changed that setting and the transfer speed it's constantly around 165-170MB/s. Learning something new every day...
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