Mirror Sync. No Longer Works as Intended

Get help for specific problems
Posts: 4
Joined: 3 Mar 2020

Kasazn

Compare settings is "File time and size" and I've tried other options like "File Content" or "File Size" but it's still the same.

It used to work flawlessly but now this issue happens, quite frustrating as every single time I start the job it has to go through ALL files which takes ages, even though prompting it to ignore all. It used to be lightning fast as it will only sync. changed files.
ERROR_ALREADY_EXISTS: Cannot create a file when that file already exists.
This also happens on my other files like work documents and etc.

FYI this is sync to my NAS (TrueNAS CE latest stable 25.10). Synchronization to my local storage works normally.
Attachments
sync4.png
sync4.png (70.4 KiB) Viewed 198 times
sync3.png
sync3.png (74.65 KiB) Viewed 198 times
sync2.png
sync2.png (63.78 KiB) Viewed 198 times
sync1.png
sync1.png (256.96 KiB) Viewed 198 times
Posts: 4908
Joined: 11 Jun 2019

xCSxXenon

Sounds like a NAS-side issue. Is it up to date and have you rebooted it?
Posts: 1
Joined: 19 Nov 2025

Sagittarius

This is a known issue with TrueNAS 25.10. After I downgraded to 25.04.2.6, everything started working again. There is an update — 25.10.0.1, which likely fixes the issue. I haven’t tested it yet.
Posts: 4
Joined: 3 Mar 2020

Kasazn

Seems to be resolved now, I guess the once in a while bugfix updates of TrueNAS CE helped?