I know this thread is over a year old but because I have two same issues like @Robot:
Weird halt times at the end of copying files
Terribly slow transfers of certain files/folders
My setup:
Unraid 6.11.5 (no Unraid Cache drive)
macOS 12.6.6 Monterey (Hackintosh) with 1 TB NVME
Everything is connected via 10Gbe over a Netgear XS708E Switch.
I also have a QNAP 872XT 80TB NAS (more to that later in this post)
Black Magic Speed Test gives me about 450-500 MB write and 980-1000 MB read speeds.
Weird halt times at the end of copying files
When I copy a large video file (45 GB) from my Mac to the Unraid server, the speed is ok but it halts for about 20 seconds at 43 GB, then it continues.
When measuring with BM Speed Test (4 GB file), there is the same phenomena. After clicking start, the write speed goes up to 450-500 MB. Before switching to the read speed test, it seems like the app is frozen for about 20 seconds, then it continuous with the read test.
When coping back from Unraid to the Mac, everything is normal.
Terribly slow transfers of certain files/folders
I tried to copy a disk image file (317 GB, created with Carbon Copy Cloner) from my Mac to the Unraid server. The write speed is constantyl between 20-25 MB/s). When I copy the same file to my QNAP NAS, I get normal write speeds.
If anyone can help, it would be greatly appreciated.