Well, it's not related to RAID-Z at all, but yes, mirroring is better with ZFS. The checksums allow bad data on either side of the mirror to be detected, so if for some reason one disk is sometimes losing or damaging a write, the other disk can provide the good data (and ZFS can tell which is correct). This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss