Re: storage
I tried using zfs debug tools (2012 time frame) to recover the fs. Was shocked how immature they were
One of the irritating things about ZFS design, even today, is the insistence that the combination of checksumming & copy-on-write mean that it "can't" get into a state of internal corruption, so fsck-like tools aren't necessary.
IMHO, it has never sufficiently taken into account the way that a FS can be externally corrupted by storage problems or administrative misconfiguration.