Hi all,
The tl;dr is I’ve experienced data loss, some 6-8 months of use of a vm, after migrating it from one TrueNas 25.10 system to a newer installation, same TrueNas version, on a different machine. I’m trying to figure out what went wrong.
For reference, I cannot go back and try to move the data from the old system again. That system is defunct now. It’s another tl;dr that I don’t want to go into and isn’t totally relevant to what I’m trying to figure out at this point.
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The details:
What I do have, is a copy of the vm and its snapshots, that was replicated from the old system to my new one, on a HDD for staging. Then I have a 2nd SSD disk that is specifically for hosting VMs. I replicated another copy to the SSD to bring it back up for production.
When I boot up the VM (after recreating it and importing the vdisk/zvol), it is showing older versions of software I had running last year when I did a different migration. There is also data missing from our webserver, data that was basically everything we’ve done since last year.
I did already try moving the copy of the data on the staging drive to the SSD a 2nd time, same result. It’s like this last year’s worth of changes completely went missing. The worst case I’m feeling is I should have taken another snapshot before migrating off the old system and not just assumed it would copy everything as-is to the staging disk on the new system. Hoping to get some insight.