Sorta… If the array was built with hybrid ZFS within unraid which is what the majority of unraid users go with as it allows for better mixing of various sized drives and easier expansion of the array in the future (in other words the main selling points of unraid) then you do not get any of the safety nets ZFS provides as what unraid is essentially doing is making a single drive zfs vdev for each drive in the array. In unraid’s own words “ZFS-formatted disks in Unraid’s array do not offer inherent self-healing protection.”.