I don’t have any redundancy, my system has an SSD (the one being slow) and 2 500Gb HDDs, in the hdds I only have movies and shows so I don’t care is that goes bad and I have a lot of important personal stuff in the SSD but is new (6 months old) from crucial and I trust that because I don’t have the money to spare on another drive (+ electricity bills) and I trust that I’ll only lose 1-2 files if it goes bad because of the ZFS protection