If the primary fails, will the replica fail over? How do you know? Are the backups working? Who's checking? Can anyone delete a directory when tired at 6PM on

If the primary fails, will the replica fail over? How do you know? Are the backups working? Who's checking? Can anyone delete a directory when tired at 6PM on a Friday? https://www.youtube.com/watch?v=tLdRBsuvVKc https://www.youtube.com/watch?v=tLdRBsuvVKc