I've recently run the rclone copy command, unfortunately had a electricity shortage during the process, when electricity was restored I started the process again or at least that was my thought but later I realized that the new command was sync instead of copy, and that inverted destination and source. As a result my server is now showing a gap in files and some of them are missed.
During second execution I also started copying a different folder in a second command line, now I'm waiting this last process to finish (4 hours) in order to try to count the real impact of this failure, so cannot run 'rclone version' to not continue touching nothing.
Of course as a bad joke, backup is not a posibility in this case. Do you have any advise on this chaos?
You do not provide any details (exact command run, what OS etc.) so difficult to be specific with any answer. But unless you have some form of local snapshots (ZFS, BTRFS) then most likely some data is gone.
I think you know the answer here. If your data is important always have backups.