I've used ZFS on FreeBSD for many years and it's absolutely rock solid. There was even a case where an IPMI had been hacked and the attacker reformatted the di

I've used ZFS on FreeBSD for many years and it's absolutely rock solid. There was even a case where an IPMI had been hacked and the attacker reformatted the disks for Windows 10 and I was able to recover most of the the data. The attack was interrupted before they could copy data to the disk and I had left a small amount of space unallocated at the end of the disk. Lessons learned: - ZFS is very robust for handling partial corruption - Always leave unallocated (~1gb) space before and after critical data partitions. accidental/malicious reformatting will likely use the entire disk so the new FS superblocks are less likely to overwrite all of the original ones. - Always have an offline backup of your partition table in case of accitental/malicious repartitioning The one thing that still makes me nervous is large stripes of mirrors where a multi-disk failure in one mirror can take out the entire stripe. For that reason I stick with simple 2 disk (or 3 disk for critical data) mirrors and avoid combining them in stripes.