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On 01/12/2021 13:23, Julian Hall wrote:
Backed up files are owned by current user but unsure if that's just because the current user has mounted the USB drive.Final attempt before I give up and use Samba. I don't /want/ to but at least it works.Tried the chown command when share mounted. Every single file 'Operation not permitted'.Can/should I copy the backed up files as it seems to think it owns them?BTW I discovered yesterday that Samba works, so although I'd prefer a native NFS solution I may end up using Samba.Julian1. Boot Live Distro. 2. Format main partition Ext4 using gparted. 3. Copy system backup onto main partition. 4. Pray. 5. Reboot. NB. As an Atheist step 4 may not work :) Worst case scenario I reinstall 19.3 and see if that wants to work now. Julian
Right circling back to this, the problem that just won't die.If you want my honest opinion it hasn't changed from the first thing I said about this, many years back. I would reclaim the disks from the Synology NAS and throw it away immediately. The NAS is and always has been the problem: it's very old, very crappy and has nothing to offer. It's also not working properly any more. There is nothing wrong with your Mint box or the NFS client setup.
I accept you're unlikely to want to follow my advice, so where do you want to go from here? It's going to be a lot of work with some potentially highly destructive and invasive testing from here on in and only really worth it if you A: just want to get to the bottom of it for personal satisfaction or B: value your own time very little. In a normal support scenario with a bill payable at the end this would simply not be worth pursuing.
So expecting that you'll likely want to both save money and go with option A: for above (and I can't blame you for that) the next thing to do is:
Create a brand new Virtual Machine, different Linux flavour. Use that to triple check the NFS setup with the NAS. It's not your client setup, but it's worth checking... again. I suppose.
Next: I'd backup the NAS which in itself might be a problem as that's probably your backup system itself. This leads to the usual dreaded "how do I backup the backup" problem which you're going to have to figure out yourself. Either way the NAS needs wiping completely and then reconfiguring (properly) and the data repopulated.
The Synology - which is a bag of crap anyway - isn't really very good at doing it's job so how the shares are populated, their permissions and a bunch of other technical stuff that can only be done via the Synology control panel is where things have gone wrong. It's where you'd fix it going forward as well. It's also the bit that changes from cheap crappy Synology consumer NAS to cheap crappy Synology consumer NAS and although I've seen a million of these things I haven't seen yours and can't directly help you with it. It's not going to help that the average low end consumer/SOHO plasticky Synology NAS box wasn't really fir for purpose in the first place and that one is now many, many years into it's life: I imagine it's by now unsupported too so even if you nuke it and reflash it with the last firmware (which you should do) it's still going to be just as unfit for purpose... with more security bugs. No thanks.
So that is how I would proceed I'm afraid. There is a middle ground I guess: after testing with a fresh VM but before nuking it completely it would be worth backing the data up first and then just try nuking all the permissions NAS-side. It would be worth experimenting a bit first on a setup that can be sacrificed to dangerous tests like recursive permission resets safe in the knowledge that you're backed up and about to rebuild it anyway. Should give you an idea of what's going to work once the data is repopulated after resetting the NAS.
There is no point in monkeying about with it from the NFS client perspective any more - there's nothing wrong with that end and nothing we've done is solving the problem. It's the NFS server.
This bit of information has long since faded into the past at this point so can I just ask again: what is the total capacity of the NAS? And how much data is on it anyway? I have a funny feeling that all this time is being wasted over a crappy little box that has a mere 1Tb available. You could have bought a 2Tb HDD for ~£50, stuck it in the Linux PC and moved all the data to it when this problem began and come out miles ahead. It would have better in every possible way too.
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