@poddingue
I'm seeing a recurrence of the snapshot_of / hidden-disks issue after patching to xapi-26.1.16-1.2 (both hosts, rebooted). Unusual element this time: snapshot-fixer.py dry-run flags ~260 VDIs across the SR that all cite a single OpaqueRef which resolves to no VDI (xe vdi-list | grep <ref> returns nothing). Holding off on rewrite until I understand whether that single-dangling-ref pattern is safe, given the set appears to include base VDIs of legitimate snapshots.
Full technical detail and questions posted on GitHub: https://github.com/xcp-ng/xcp/issues/844.