[pizza234]

If with "recovery", you intend recovering that file, it's not possible, since all the copies available in the mirror are corrupted.

In this case, the recovery (repair) of the system (that is, to bring it to a clean state) simply consists in deleting the file (see https://docs.oracle.com/cd/E26505_01/html/E37384/gbbbc.html#...).

If there was an intact copy of the file available in the mirror, then one doesn't need to do anything, as ZFS is self healing: https://blogs.oracle.com/timc/demonstrating-zfs-self-healing.

[kchamplewski]

Presumably they're referring to Datto's recovery process (i.e. recovering automatically from secondary or tertiary backups), as opposed to just the ZFS mirror.