RaidRover

I now tried iperf3 via WSL, which gives me 929 MBit/s. Not optimal, but ok I guess? I wonder why some windows binary is way slower (639 MBit/s). The transfer speed with SMB is still stuck at 69 MB/s. With another Laptop, this time Ubuntu 22.04, I tried again. iperf3 gives a transfer speed of 942 MBit/s, which seems good. However, the transfer speed via SMB still is below 70 MB/s. I also added a SSD Cache partition where the data is written to and the CPU has capacity. Do you have further advice? Thanks in advance!

Thanks! Actually the router seems to be one bottleneck; I can get around 700 MBits/s through it. When I add a switch connected to the router and both my laptop and unraid, iperf gives me around 800 MBit/s = 100 MB/s and explains part of the missing speed. Unfortunately, the file transfer only got up to 80 MB/s, so 20 are still missing.

I added the cache to the setup (internal SSD). Unfortunately, the transfer speed only slightly increased to around 60 MB/s. At the same time, the CPU usage increased / has spikes (see image). I tested the disk directly on my laptop. When writing the same data, it starts with around 500 MB/s, goes down to around 200 MB/s and very slowly goes further down to around 150 MB/s. So it seems that the bottleneck is somewhere else. Is there something else I could test?

Thanks for the answer. It is 2.5". How much does this decrease the performance when transferring ~20 G in 600 MB files? Thanks for that hint. I choose the USB devices because I did not want to spend hundrets of euros for now and this with the ThinkCentre seamed like a cheap but ok option.

Hello Community, I am new to unraid and just setup a (looking to the forum pretty small) unraid setup. The transfer speed is slow, way slower than expected (I get around 54 MB/s). Therefore, I have two questions: Is my expectation (see below) wrong? If not: Where is the bottleneck? My setup and what I expect Network: I use Gigabit Ethernet, which limits the transfer rate to around 936 Mbit/s = 117 MB/s Computer I use a refurbed Lenovo ThinkCentre M900 CPU: Intel Core i5-6600T @ 2,70GHz RAM: 16 GB DDR4 The CPU load in the dashboard is around 12-30 % during transfer, so it does not seem to be a problem? Disks (both via USB 3) Currently no cache (fix one problem at a time) Disk 1: Seagate IronWolf 4TB, 5400 U/min CMR, Max. Sustained Transfer Rate OD (MB/s) 202 MB/s Write speed shoudl be somewhere above 150 MB/s? Is that realistic? Connected via a SABRENT USB-HD Docking station They state 5Gbps which is USB 3.0 speed, so it should not be the bottleneck? Parity: WD Elements Portable 5400 U/min Write speed should be above 110 MB/s? Disk Connection The disks are connected via USB 3.0 with 5GBits/s. That should be around 450 MB/s in practice. The ThinkCentre has plenty of these ports, but unfortunately only one USB 3.0 Controller. So I guess the speed needs to be shared across all devices? The Unraid USB stick should not take buch, so still 200 MB/s should be available per USB disk. root@x:~# lsusb -t /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/10p, 5000M |__ Port 3: Dev 2, If 0, Class=Mass Storage, Driver=usb-storage, 5000M |__ Port 4: Dev 3, If 0, Class=Mass Storage, Driver=usb-storage, 5000M |__ Port 5: Dev 4, If 0, Class=Mass Storage, Driver=usb-storage, 5000M /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/16p, 480M With this, I would expect a write speed to the NAS of about 110 MB/s or more, with the WD Elements portable hdd being the limit. Finding the bootleneck In practice, I only get 54 MB/s when sending data (files of around 600 MB each) to the NAS vie the Windows Explorer and a SMB share. I tried to test the disk speed with the DiskSpeed container from the "Apps" tab, but that just does not work. When I click on "Benchmark Drives" and leave the default settings, I just get an empty window and no results. Unfortunately, I could not fix that. Are ther alternative ways? What else should I test? Thanks in advance for help!