Reliable storage

I've been storing a lot of data somewhat reliably at home, but with my family now entrusting me with their photographs, it was time to up my game. I'm setting up an HDD NAS for offsite backups. My home storage and media server was already running NixOS, ZFS, sanoid & syncoid (between a zpool of 4 SSDs and a zpool of 8 HDDs and 1 L2ARC SSD partition). A little bit of copy-pasting in my flake…