Example: a server is backed up to hard drive on another server on-site (copy #1). This backup server then archives copies of all the backups to a hard drive that can be taken off-site (copy #2). Then this backup server also syncs to another server at a remote location (copy #3). The idea of creating another backup that can be taken off-site (just in case the hard drive that was archived to fails) is being tossed around now.
That's one backup on-site, 2 copies that are physically walked out of the building, and one synced to a remote location. Where does one draw the line?