Rsync not updating files
How do we ensure that those are deleted from the destination as well?You need to use the '--delete' option which will take care of such cases.
It takes only one click to make a copy of your data and you can carry terabytes of data on a hard drive smaller than your wallet.
Let's assume you created a directory data-2 on the second hard drive and want to sync the two without any confusion: This command will simply make an exact copy of your files in the data-1 directory inside the data-2 directory.
What if you have symlinks of different permissions of file ownership and you want to preserve them?
I don't mount the second, or the back-up hard drive.
Mounting it and working on files saved on this hard drive will complicate things because when I run the rsync command it will overwrite the changes from the primary hard drive.