I ran across this thread trying to figure out how a particular folder kept appearing on my NAS. A few years back when I had originally setup my tower with Ubuntu and Plex Media Server. I had setup
gadmin-rsync to back up some TV show folders, and never put it to use after having this same issue (the message about
cron(d) not running).
I wound up setting up a
cron job manually (
crontab -e). Recently, I began backing up one of the folders to another drive, rather than the NAS, and removed the folder from the NAS, as the NAS was filling up. But this folder kept reappearing every few days. A few minutes ago I found that
gadmin-rsync has been backing it up twice a week, all along.
When I removed a folder from my backup list (using
crontab -e), this folder kept reappearing, so I removed all the
cron jobs in an attempt to find out how this folder was being backed up. Low and behold it appeared on the NAS again. I wound up opening
gadmin-rsync, and its log file shows that it has been backing up the original list all along at the times I had scheduled it years ago.
So, to anyone having this error message who would rather use a GUI
rsync solution, I recommend you set the backup time to a few minutes out and try saving the backup again to see if it's actually working first, even if you are getting this error message.