NFS locks up after I copy a ISO or backup

Labomba

New Member
Mar 11, 2025
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Hi guys,
I use a Synology NFS mount on 4 Promox clients, 3 of them have a HP 640sfp28 network card, which is a Mellanox ConnectX4-LX Card.
On the 4th client I can use the NFS mount without any problem, on the 3 others I can asses the mount and see the files that are on there.
But when ik start a Backup or upload a ISO then the copy works perfectly, but just after that the copy hangs and the task keeps running infinitely.
When I copy a ISO the last thing it does is: command: cp -- /var/tmp/pveupload-a0e2dc9f8698c3eb1fa8f1aa8e423623 /mnt/pve/synologynfs/template/iso/ubuntu-24.04-desktop-amd64.iso
And then it stops.
Does anybody have some tips about how to solve this? I tried all possible settings on the Synology side, but because the 4th client working perfectly, it cannot be a setting in the NFS part (I think).
Or could it be a limitations in the HP network card, I saw that I can cross flash these to Mellanox firmware, maybe that could be a solution?
Best regards,
And thanks in advance for those who reply!