[6.10] TimeMachine backups continue to fail "failed to attach using diskimages2" "operation not supported by device"
I first posted regarding this in the prerelease section here but just testing and reporting for 6.10. See the initial bug report for more details.
Summary:
TimeMachine completes one backup but then cannot mount that sparsebundle for future backups. This error is being reported by multiple unraid and synology users.
Minor
Yep this worked 100%. All Macs, M1/Intel, are backing up successfully to preexisting and new backups on a single Time Machine Unraid share now that I've downgraded to 6.9.2 from 6.10.3. Unfortunate that this is necessary, hopefully @limetech will reopen these bugs and investigate further.
So just to summarize:
Unraid 6.10.3 uses smbd version 4.15.7, while Unraid 6.9.2 uses smbd version 4.12.14 (checked with "smbd --version")
All other SMB-related configs seem identica
