ZFS Snapshots for Data Hoarders: Catching Yourself (and Ransomware) Before It Costs You the Array
Every layer of protection covered elsewhere on this site has a specific job. RAID survives a dead drive (see the RAID redundancy guide). Checksums and scrubs catch silent corruption (see bit rot and checksumming). The 3-2-1 strategy (see the backup guide) gets a copy off-site. None of them protect you from the most common actual cause of data loss in a homelab: you, or something acting with your credentials, deleting or overwriting a file that was perfectly healthy a minute ago. ...