Zfs Recovery Tool _top_

ZFS completely omits standard file system superblocks. If a tool does not understand how to traverse ZFS Uberblock transactions, it will read the raw disks as unformatted space. Native ZFS Recovery Capabilities (Command-Line)

| Failure | Recovery challenge | |---------|--------------------| | Missing devices (raidz, mirror) | Reconstruct via parity or copies | | Uberblock overwrite | Scan for valid uberblocks by txg | | Corrupt MOS (Metaslab Object Set) | Need to rebuild from DVA pointers | | Partial overwrite of a block | Use checksum to locate other DVAs | | Faulty disk firmware returning stale data | Need ZFS checksum cross-verify | zfs recovery tool

Example :