@whitequark I have a new hard drive I intend to use primarily for backup and I am currently considering BTRFS or ZFS for the Linux part instead of ext4 (because I hear they can do some thing of storing extra error-checking data to protect against physical disk corruption). In your view, if I intend to use mainline Debian indefinitely, will BTRFS, ZFS, both, or neither give me the least pain getting things working?