Possibly technically, but ZFS's hashes IIRC are more nontrivial to collide than CRC32 by default [for the data checksum/metadata checksum, fletcher/sha256/[etc]

Possibly technically, but ZFS's hashes IIRC are more nontrivial to collide than CRC32 by default [for the data checksum/metadata checksum, fletcher/sha256/[etc]]. I can't even guess about the pathology of the dedup code. I want to say that the equivalent filename lookups/creation are fundamentally different in ZFS, but I genuinely don't recall how that sausage is made.