Historically, tools like SASA (Solaris Autonomous System Agent) were used on Solaris/Illumos distributions. While less common in Linux/BSD environments today, the principles remain: scanning raw disks for ZFS object identifiers (ZAPs) to reconstruct metadata.
A professional service (rather than a downloadable tool). They specialize in physically damaged drives within ZFS arrays (RAID-Z/Mirrors) and can manually reconstruct the RAID geometry and ZFS pointers in a clean room environment. zfs recovery tool
Would you like a concrete Python script for scanning DVAs from a raw vdev image, or deeper analysis of ZFS on‑disk checksum structures? but snapshot replication)
Key commands for recovery:
(not recovery, but snapshot replication) zfs recovery tool