Hi Pete,
thank you for your feedback. You can improve the bash script by adding a check if the initial mount commands fails and executing a fallback action.

For example, you can define 2 custom functions:
mount_ok() {
rsync *****
rsync *****
***********
umount /mnt/my_nas
}

mount_fail() {
echo "Mount failed" >&2
# you can add notifications here
}

and then execute the following IF statement where the mount_ok() actions are performed when the mount task succeeds, the mount_fail() actions when it fails:
if mount -t cifs //192.168.1.50/backup \
-o username=backup_user,password=backup_password,vers=2.0 \
/mnt/my_nas/
then
mount_ok
else
mount_fail
fi

Finally, this command already copies directly to a remote drive (with CIFS). I suspect that it filled your disk when it doesn’t mounted the remote drive and, in this scenario, the OS considered the /mnt/my_nas/ folder as a local folder. With the above check you should avoid this problem.

Hope this can help you.
Best regards,
Giuseppe

Brilliant tutorial though, I wish I’d used this when I set mine up a few years ago! Would have saved me a lot of bother.

Uhm. Rather than using rsync to cot to a local, mounted drive, is it possible to use rsync to copy to a remote server address & share???

Hope to hear from you soon.
Pete