Hi, can you check for snapshots in the trash namespace? # rbd snap ls --all <pool>/<image> Instead of removing the feature try to remove the snapshot from trash (if there are any). Zitat von Adam Boyhan <adamb@medent.com>:

I have a small cluster on Pacific with roughly 600 RBD images. Out of those 600 images I have 2 which are in a somewhat odd state.

root@cephmon:~# rbd info Cloud-Ceph1/vm-134-disk-0 rbd image 'vm-134-disk-0': size 1000 GiB in 256000 objects order 22 (4 MiB objects) snapshot_count: 11 id: 7c326b8b4567 block_name_prefix: rbd_data.7c326b8b4567 format: 2 features: layering, exclusive-lock, object-map, fast-diff, deep-flatten, operations op_features: snap-trash flags: create_timestamp: Fri Aug 14 07:11:44 2020 access_timestamp: Thu Jun 8 06:31:06 2023 modify_timestamp: Thu Jun 8 06:31:11 2023

Specifically, the feature "operations". I never set this feature; and I don't see it listed in documentation.

This feature is causing my backup software to not be able to backup the rdb. Otherwise, it's working aok.

I did attempt to remove the feature.

root@cephmon:~# rbd feature disable Cloud-Ceph1/vm-464-disk-0 operations rbd: failed to update image features: 2023-06-08T07:50:21.899-0400 7fdea52ae340 -1 librbd::Operations: cannot update immutable features (22) Invalid argument

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