rsync backups may create inconsistent backups with binNMU packages

[framps]

It's not an issue but a warning -> See this thread

Unfortunately rpi-clone doesn't support to pass any additional option for rsync. rsync uses the date and file size to decide whether a file was updated and will not backup binNMU files which keep the date and file size in new packages. You manually have to modify following line in rpi-clone:

rsync_options="--force -rltWDEHXAgoptx"

and add c if you want to use the checksum algorithm. Keep in mind this will have a serious performance impact.

I detected this issue when I restored a Raspberry 1B running with Bookworm and the NetworkManager didn't start any more. I described the fix here on my website. Actually I used raspiBackup to create and restore the backup but this is an issue for every backup tool which uses rsync as rpi-clone also does.