dotfiles/nix/system/svalbard/README.md

To set up ZFS on the spinning discs, followed steps derived from these sources (but without encryption):

• https://ipetkov.dev/blog/installing-nixos-and-zfs-on-my-desktop/
• https://cheat.readthedocs.io/en/latest/nixos/zfs_install.html

# DISK=<disk from /dev/disk/by-id>
# POOL=<a name for the pool>
# zpool create "${POOL}" $DISK
# zfs create -o compression=on -o mountpoint=legacy "${POOL}/main"

then added the ZFS filesystem to hardware-configuration.nix (use the zfs created label as the device) and rebooted.

Don't forget to chown the mounted system so that non-root can read/write there.