my Qnap TS-h973ax with QTS-h5.2.8.3359 is facing a similar problem.
So far, I have NOT created any snapshots myself, but have left everything to the GUI automations, which also created/deleted snapshots there.
The issue now is that NO ZFS snapshots are displayed on ANY ZFS volume in the GUI.
However, at the console, a simple “zfs list -t snapshot | wc -l” returns 194.
Support is providing the standard ZFS commands:
zfs destroy zpool1/zfs21@snapshot47902
or to delete them all at once:
zfs list -t snapshot -o name | grep zpool1/zfs21@ | xargs -n1 zfs destroy
BUT:
every attempt to delete is answered with
cannot destroy snapshots: permission denied
The problem now is that there are 1.9TB on a ZFS volume, but zfs list already shows over 5.9T.
So it seems I am affected by the same problem, but WITHOUT having created snapshots myself at the console.
sorry, I’ll deliberately write in German here, hoping that’s okay, because the entire forum is displayed to me in German—it apparently gets translated on the fly. (I just saw the automatic AI translation above)
@NA9D, QTS Hero 5.3 is running on the Qnap.
I had opened a ticket.
They kept referring to “zfs destroy…”, and after support connected via TeamViewer, the issue was escalated to the next level. I had to set up remote access using the Helpdesk app on the box. After a follow-up, the issue was resolved. However, I don’t know exactly what was done.
Let’s see if I find out.