"Due to potential legal incompatibilities between the CDDL and GPL, despite both being OSI-approved free software licenses which comply with DFSG, ZFS development is not supported by the Linux kernel"
@mcc been that way for decades now
@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?

@mcc btrfs

my headmate, who is obsessive over data integrity, runs btrfs on her NAS with zero issues. it has nice things like snapshotting and such. the reputation btrfs has dates back to many years ago and i don't think the issues people distrust it for have mattered for quite a while

@mcc none of what i said applies to btrfs raid 5/6 because we have zero experience with that in particular
btrfs(5) — BTRFS documentation