LrdSpn

At this point I agree, that this is likely not an Unraid issue. I've changed cables, switched LAN ports on my router and made sure that every interface is communicating with the correct speeds (at least on paper). There seems to be something, most likely on the Mac side, limiting my connection to about 100mbit. The cables are brand new. So unless 3 cables I tried were all bad/damaged, that's not it.

Did that. From the Mac side I got about ~1400 retransmissions in about a 10s interval. Hmm.. Thing is, even on single large files, there's no difference in behavior when writing directly to the array or ssd cache pool. Can't imagine this to be normal to be honest. Especially as it results in average writing speeds of ~30mb/s.. That doesn't seem right at all. I've since created a Ticket with official support. I'll update this should we reach a fix for the problem. In the meantime I am grateful for any further ideas to fix this! :)

Hi everyone, I'm new to Unraid and have been troubleshooting a performance issue for several hours. At this point I've ruled out many of the obvious causes and would appreciate another set of eyes. HardwareUGREEN DXP4800 GT Unraid 7.3.2 2 × WD Red Plus 8 TB SATA Disk 1 Parity Cache: NVMe SSD (Btrfs) Mac mini running macOS 26.5.2 Router: FRITZ!Box 6670 Cable NAS connected via 1 Gbit Ethernet Mac connected via built-in Gigabit Ethernet SymptomsCopying a large file (67 GB) from the Mac to Unraid: Transfer starts around 150–170 MB/s Drops to 0 MB/s for roughly 10–12 seconds Resumes Repeats throughout the transfer Average throughput is only 30–60 MB/s. This happens: writing directly to the protected array writing to the cache SSD with Finder with cp with scp So it doesn't appear to be Finder-specific or cache-specific. What I've testedLocal disk performanceOn the NAS: dd if=/dev/zero of=/mnt/disk1/testfile bs=1M count=10000 status=progressResult: ~200 MB/s sustained. This suggests the disks and filesystem are capable of normal write speeds. Networkethtool: 1000 Mb/s Full Duplex Link detected: yes Router also reports both Mac and NAS linked at 1 Gbit. System utilizationDuring transfers: CPU low RAM low Network not saturated Dashboard sometimes shows disk writes dropping to zero during the stalls. iostatDisk wait times appear normal (roughly 10–20 ms). I don't see obvious multi-second I/O waits. sarNetwork throughput averages roughly 30–35 MB/s during transfers. SMARTSMART appears healthy. QuestionHas anyone seen similar behavior on the DXP4800 GT or with Unraid 7.3.2? Any advice would be greatly appreciated.