Time Machine no longer taking snaphots after Fangtooth upgrade

[Captain_Morgan]

@Constantin

FWIW, I am running multiple dedicated TM shares on 25.04 w/just the usual issues. Ie had a basic TM archive corrupt and refuse to take further updates. Deleted the TM share contents, redid the TM backup from scratch. That was likely a bad choice, however, I should have tried rolling back to an earlier snapshot first before nuking the archive.

If you know of a speciifc config that works, lets document it here as a workaround.

[Constantin]

Here is some of my shares info, with the “advanced options” enabled. All of them are “basic” time machine shares where each user gets their own dataset and share. Sharing is via SMB. This is on TrueNAS-25.04.2.4

First time for me to notice the TM Quota box, which seems like a new thing to me. I remember struggling with quotas back in the FreeNAS 11 or 12 days when I didn’t understand yet how child quotas affect snapshots and how running into a quota issue is NOT handled well by Time Machine. This dedicated TM quota box inside TrueNAS (if it works as expected) could nicely supplement the TimeMachine quota stuff built into MacOS.

Here are some dataset properties, again with “Advanced Options” enabled to show more details.

I left out some of the other stuff as it was empty.

Lastly, here is a top level dataset summary:

Pretty plain vanilla.

[Captain_Morgan]

so this has the recycle bin option…

Can someone explain why they are not seeing it?

[Constantin]

I’d look into what exact version of TrueNAS they’re using, are they running / configuring a SMB based Basic TimeMachine share, and if they are enabling review of “advanced” settings? IF it’s the same exact version of TrueNAS, then we have a major mystery on our hands, even if Halloween is past.