Joris Posted May 11, 2021 Share Posted May 11, 2021 (edited) Hello, I just started testing my Unraid build and am having a problem with the transfer of files from a Qnap NAS to my new Unraid server. I mounted a nfs share with Unassigned Devices and started a transfer with Kursader. When the transfer begins, the speed is maxed out at around 1000Mbps because of the LAN connection. All goes well for about 20-30GiB after that it usually drops to a few hundred KiB/s of simply stalls. After a bit of fiddling, i changed the Disk Cache 'vm.dirty_background_ratio' (%): to 10% and Disk Cache 'vm.dirty_ratio' (%): to 4% This seemed to fix the issue (was able to transfer 400GiB) until I started a preclear on an unmounted hard drive connected via a HBA card. Then the speed then dropped to a few hundred KiB/s/stalled. Edit : After it stalls, it I cancel the copy and start a new instance, it copies back at around 1000Mbps. For the moment, I'm not using any parity disks and the issue happens with a xfs and an encrypted xfs file system. I also tied TurboWrite but it didn't have any noticeable difference. Any idea on what to try that could help would be great. My build is currently like this: Motherboard : Gigabyte X570 Aorus Master CPU : AMD Ryzen 7 3800X 4 hard drives connected to MoBo 4 hard drives connected to LSI SAS9305-16i all hard drives are 8Tb WD Red 2x 16GiB of Corsair Vengeance LPX, DDR4 Edited May 11, 2021 by Joris New information Quote Link to comment
Joris Posted May 12, 2021 Author Share Posted May 12, 2021 I captured a transfer event that stalled with netdata. That data was being written to the sdg disk when the stall happend. netdata-JBAS-NAS-20210512-071038-304.snapshot Quote Link to comment
JorgeB Posted May 12, 2021 Share Posted May 12, 2021 First try an SMB transfer from a computer to see if it's the same, if yes grab the diagnostics after the stall and post them here. Quote Link to comment
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