Actually you can correct data blocks, on a single-drive ZFS pool, if you set the attribute copies=2 (ditto blocks): https://blogs.oracle.com/relling/entry/zfs_c

Actually you can correct data blocks, on a single-drive ZFS pool, if you set the attribute copies=2 (ditto blocks): https://blogs.oracle.com/relling/entry/zfs_copies_and_data_protection https://blogs.oracle.com/relling/entry/zfs_copies_and_data_p... Obviously this redundancy feature makes you use twice the disk space you would normally use.