I shall clone the USB drive, thanks.
I was born with MS-DOS, I can deal with CLI. 🙂 It's Linux I don't like!😀
AI can be great but way too often it gives inaccurate/outdated/non-relevant information so I am not optimistic. Unfortunately the ReadyNAS Pro 6 doesn't have an expansion slot so I am stuck with that NIC - or with a USB 2 Ethernet adaptor. It's a shame, it's a nice machine after all. Sure, it's very old but I only use the NAS for storage.
Maybe what I can do is to clone the USB drive onto another one I don't care about and remove flashdrive. Wait until the NAS crashes and then see what the logs say - if anything. Plus some memtest and maybe check VCORE with my scope. Or just re-cap the motherboard without thinking too much, I remove SMD caps for work, it's not a big deal to me.
I have another NAS, an old N40L I paid £30. That has an expansion slot if I needed it and it works just great. Maybe I should just find another one of those - though I'd lose one bay.
Oh well, it's never easy.
Thanks for all the help for now, I'll keep this thread posted for future reference.
(I found the bug the user above filed with bugzilla and they seem to conclude that by enabling HW flow control on their switches, the issue mitigates to the point it becomes a non-issue.
They still mention the NAS to stay "reachable" and I do remember it WAS my issue before so I don't think this is my issue to be honest. I'll keep looking!
https://bugzilla.kernel.org/sh…format=multiple&id=219713. )